PRP XDS TRIGGER SPRING KIT
Powder River Precision just released their new XDS trigger kit this week. PRP say's that the kit was designed to lower the trigger pull weight of the XDS pistol while still providing the needed reliability in a carry pistol. The kit if properly installed should give you a 4.5 - 5 pound trigger pull weight.
Springfield Armory Hex Red Dots
The Hex Wasp is in the micro red dot class, and in fact uses the same footprint as the Shield RMSc/J-point. The Micro red dot is meant for small pistols like the Hellcat and XDS. And since Springfield uses one of the industry standard foot prints, while the Hex sights are Springfield products, I bet they would work on different brands of pistols as well.
Advantage Arms XD-22LR
Advantage Arms has updated their website to show that in about a month, June 2013 hey will release their new XD conversion kit. The XD 940-4 is a 22LR conversion kit for the Springfield Armory XD Service model with a 4 inch barrel.