Heads up! Sony is doing a temporary promotion in the US version of the PlayStation Store, and Rag Doll Kung Fu: Fists of Plastic is currently available for free. The language used is that the game will be free "this week," but it isn't exactly clear if that means for the rest of this week or for the next seven days. Either way, go get it!
Additionally, Bionic Commando: Rearmed is currently available for $4.99, down from its usual price of $9.99. My guess is this is an attempt to promote next week's release of Bionic Commando. Regardless of the reason, Rearmed is an amazing buy at full price, so if you don't have it already, getting it at half price is something I can completely and totally recommend.
ZEN Pinball and Texas Cheat'em are also out this week on PSN. I'm interested in ZEN Pinball because I'm a huge sucker for digital pinball. I played some Texas Cheat'em on the 360 last night and didn't much care for it. It adds a bunch of weird, minigame-driven cheats on top of the standard Texas Hold'em ruleset, so players are constantly trying to win the hand by any means necessary. Neat idea, I guess, but it certainly didn't make a great first impression.