PSX4DROID - Sony Playstation Games on Android Cell Phone (Samsung Galaxy S)

This is a $5.99 Emulator in the Android Market that lets you play original Sony Playstation games. Search for PSX in the market. It works really well on the newest android phones.

The games i tried out:
Digimon World 3 - It seems to run very well
Crash Banicoot Team Racing - Didn't work
Harvest moon - Didn't work
Mortal Kombat Trilogy - Freezes at intro
Street Fighter vs Xmen - works well but seemed a little slow

You need the BIOS file or the app is worthless, which you can find here: http://bit.ly/8anBB5

You need to find roms to play different games, which you can find on the internet but understand that it's not legal to own roms if you don't own the actual real game.

A lot of games don't work, but for the ones that do, they're definitely enjoyable to play. You can use a Nintendo Wiimote controller from the Wii instead of the touch screen or keypad but some phones don't work with that feature.