It features:

• Polymer Frame
• Slim Profile
• Striker-fired
• 1911-position manual safety
• Fits in Glock holster (UPDATE: See holster list below)

Read a review here.

Watch a video of it here.

UPDATE:

More info at Ruger.com:

Models: SR9 (17+1 capacity) SR9-10 (10+1 capacity)
Price: US$525 for both models

Features:

• Weighs 26.5 oz., in a package of just 5.52″ H x 7.55″ L x 1.27″ W
• Reliable, striker-fired ignition
• Easy, “Semi-Double Action” trigger-pull – 6.5 pounds.
• 17+1 Capacity. (Note: 17-round magazines are not available in all states and locales; 10-round magazines are available where required to meet state and local regulations limiting magazine capacity.)
• Chambered in 9mm Parabellum (9mm x 19).
• Short trigger reach.
• Unique reversible backstrap (flat or arched) to accommodate grip preferences.
• Slim, ergonomic grip features a 17-degree grip angle and three, 22 lpi checkered panels that provide a sure grip without being abrasive.
• Patented Ruger camblock helps absorb recoil.
• High-visibility 3-dot sight system is click adjustable for elevation and drift adjustable for windage.
• Picatinny rail accepts modern sighting devices (lights, lasers, etc.).
• Ultra-slim stainless steel slide.
• Ambidextrous magazine release.
• Ambidextrous 1911-style manual safety.
• Internal trigger bar interlock and striker blocker, trigger safety, and magazine disconnect.
• Visual and tactile loaded chamber indicator.
• Suggested retail price of just $525, including hard case, extra magazine, magazine loader, padlock, and instruction manual.

SR9 Specs:

Caliber: 9mm Parabellum (9mm x 19)
Capacity: 17+1
Finish: Stainless
Grip: Glass-Filled Nylon
Barrel Length: 4 1/8″
Groove: 6
Twist: 1:10″ RH
Overall Length: 7.55″
Weight: 26.5 oz.
California Approved: No
Massachusetts Approved: No
Front Sight(s): Drift Adjustable
Rear Sight(s): Adjustable
Other Features: Ambidextrous Manual Safety and Magazine Release, Reversible Backstrap and Magazine Disconnect
Suggested Retail Price: $ 525.00
Miscellaneous: Ruger’s First Striker-Fired Pistol

SR9-10 Specs:

Caliber: 9mm Parabellum (9mm x 19)
Capacity: 10+1
Finish: Stainless
Grip: Glass-Filled Nylon
Barrel Length: 4 1/8″
Groove: 6
Twist: 1:10″ RH
Overall Length: 7.55″
Weight: 26.25 oz.
California Approved: No
Massachusetts Approved: No
Front Sight(s): Drift Adjustable
Rear Sight(s): Adjustable
Other Features: Ambidextrous Manual Safety and Magazine Release, Reversible Backstrap and Magazine Disconnect
Suggested Retail Price: $ 525.00
Miscellaneous: Ruger’s First Striker-Fired Pistol

More here.

UPDATE:

Ruger has posted a list of compatible holsters:

Hunter Leather:
5029 Belt Slide
5229 Open Top
5129 Shoulder Holster
1300 #13 Inside the Pant 1300

Galco:
CT5224B Cop 3 Slot
84122 Fletch Holster
84155 Classic

Bianchi:
7001 Thumpsnap – Holster-Size 13
7115 Thumpsnap Duty – Holster-Size 13
105 Minimalist-Size 13/15

Uncle Mike’s:
Nylon All Size 15
9521 Pro-3 RH and LH
9821 Dual Retention
9921 Tactical Thigh

Safariland:
4062-23-21 Inside the Pant
527-836 Belt Slide
070-383-161 SS111 Duty Holster

The list is here.

UPDATE: Some more photos:

The safety on and off:

The back of the striker is visible when the action is semi-cocked. Nice.

Loaded chamber indicator:

Stripped:

The manual can be downloaded here (I have mirrored it on this site because the ruger site is *very* slow at the moment).

UDPATE:

The Unforgiving Minute has a less than positive review:

CAUTION: Dry firing your RUGER SR9 with the magazine removed may result in damage or unnecessary wear to the striker blocking mechanism.

Didn’t we just go through this with the P345? Guys, if you just HAVE to include a mag safety, at least go to the trouble of engineering it so the damn thing won’t break like that.

More here.

UPDATE:

Some videos about the SR9.

Ruger SR9 History

Ruger VP Bob Stutler explains the 20-year journey Ruger has taken in the evolution of their handguns to the new SR9 starting with the Ruger P85 centerfire autoloading pistol.

Watch it here.

Ruger SR9 Features

Ruger VP Bob Stutler points out the various features of the new Ruger SR9 including the reversible backstrap, low-profile sights, ambidextrous safety, and high capacity 17-round magazine.

Watch it here.

UPDATE

GunBlast have done a comprehensive review:

While on the subject of the SR9 trigger, I have heard early reports from those who have handled, but not necessarily fired, the SR9 that the trigger pull is somewhat gritty. Mostly this is due to dry-firing the weapon without a magazine in place. Ruger warns SR9 owners to not dry-fire the pistol without the magazine in the gun. The SR9 has a magazine safety, which is located in the slide… The trigger pull on my sample gun exhibited these same traits when dry-firing the pistol without a magazine in place. However, while actually firing the pistol, it has a pretty decent trigger pull… After shooting the SR9 extensively, the trigger pull has also improved somewhat. It compares favorably with the trigger pull on other pistols of its type.

The sights on the SR9 are a very good design. The front is drift adjustable for windage, and the rear is adjustable for windage and elevation. They are much better sights than those that are supplied with most competitive pistols.

I like many features of the SR9. It is very user-friendly to left-handed shooters like me. It is slim. It is reliable, rugged, and backed by the famous Ruger reputation for customer service. I like the thumb safety. I like the large trigger guard that can easily accommodate a gloved finger. I like the steel magazines. I love the slim grip! I also like the fact that it is American made.

More here.

UPDATE

Ruger are now offering a version of the SR9 with a blackened stainless slide

The recently launched Ruger SR9™ pistol, the first striker-fired pistol from Ruger, is now available with a blackened stainless slide. The multi-step blackening process improves both the durability and corrosion resistance of the stainless steel slide by creating a surface hardness of 68Rc. The extra hard finish also reduces scratching and holster wear.

Looks nice, but I think the stainless slide looks better.

UPDATE

I came across a video of an SR9 in action

UPDATE

A very nice photo taken by ScaredOnce and posted at PAFOA

UPDATE

A OD green frame model is now available. Looks nice.

UPDATE:

Jason took some great photos and has licensed them under a Creative Commons Lisence. I have uploaded one of them to the wikipedia Ruger SR9 page. Thanks Jason