There are numerous emulators for the original Sony PlayStation available on the Web these days, and it looks like it won't be long before iPhone and iPod touch users will be able to enjoy some good old PlayStation action on their respective Apple gadgets.

It's still in development, but the psx4all PlayStation emulator for Apple's iPhone and iPod touch is quickly racing towards release. According to developer zodttd, the final version of psx4all will include memory card and possible save state support. The interface will apparently be "similar to gpSPhone's just with 4 hard buttons instead of just A+B, and L2 and R2 buttons."

The developer also estimates that around 75 percent of games will be compatible with psx4all, although there's a lot of optimization left to be done. Keep checking back here for more updates on this promising project.