This is really great news for shooters on a budget. Mossberg have developed a new trigger system called the Lightning Bolt Action (LBA) Trigger System which will be available next year (2009) on their centerfire bolt action rifles the 4×4 and 100 ATR. The trigger is adjustable from 2 to 7 lbs.
From the press release:
With its distinctive skeletonized lightning bolt trigger blade, the Lightning Bolt Action Trigger System offers the best in form and functionality, giving the shooter the flexibility of adjusting the trigger pull without the need of taking their rifle to a gunsmith. A simple twist of a standard screwdriver enables the LBA trigger to adjust from 2 to 7lbs. The design of the LBA trigger’s sear engagement offers a truly crisp, creep-free trigger, optimizing accuracy. The LBA trigger blade blocks the sear from releasing the striker unless the blade is fully depressed, even at the lightest adjustment setting. The trigger assembly is machined from aircraft-grade aluminum then hard-coat anodized to military specifications, preventing corrosion and minimizing wear over time.
The 100 ATR is a cheap bolt action rifle often recommended to new, young and/or shooters on a budget. Now they will be able to get an adjustable trigger out of the box.
Savage started the trend of rifle manufactures offering decent triggers when they introduced the adjustable AccuTrigger. My only gripe with the AccuTrigger is the special tool needed to adjust it. A screwdriver, which the LBA is adjusted with, would be much more convenient.

Mossberg 100 ATR
A new safety trigger for the Glock has been launched by American Tactical Imports
From the press release
SIDERLOCK® from American Tactical Imports is a security trigger designed for GLOCK® pistols which replaces the original trigger to offer a safer and more secure blockade of the firing action.
The concept is simple; with a push on the safety pin a sliding pin acts to block or release the movement of the central pivot of the trigger whereby avoiding an accidental discharge of the weapon. SIDERLOCK® behaves exactly as the original GLOCK® trigger when it is in the fire position all the while maintaining the original manufacturer specifications and its immediate availability of shot.


Having not seen one I cannot comment on how useful it would be. I just hope no one will draw a Glock in self defense only to have the trigger jam!
American Tactical Imports will be displaying it at SHOT Show this year.
ExistingThing has a very cheap solution to the Walter G22 (.22lr bullpup rifle) trigger problem.

The Walther G22 has a terrible trigger, lots of take up, and a very mushy break. I saw it as an opportunity to practice my trigger control, and got pretty good with it. After a recent trip to the range I took it apart for cleaning, and decided to spend a bit trying to figure out a cheap, reliable, effective way to shorten the trigger pull. Previous attempts had been fruitless, but this time I actually figured something out.
More here.
I came across an article showing you how to make the Glock trigger pull smoother and well as showing you how to detail strip a Glock. I have not tried this.

What we are going to do here is to polish (not alter) some parts to make the trigger pull (which admittingly is a bit different) smoother. I’ve also included the extra steps to completely disassemble the gun and get it back together again
Read it here.