via http://www.emucr.com/

WebEmu NES v0.1beta for PlayStation 3 is released. This is a web-based emulator, so you can access it with both OFW and CFW to play a few NES games. The emulator is still in beta form so you maybe find some issues. WEN is a first Web-Homebrew for PlayStation 3, u can play now a NES games. No need a Jailbreak or CFW, just a Web!. Works on any Firmware. This is still beta so you can cause low fps, or hangs a webbrowser . Ohh..and this version not support yet Dualshock/SixAxis only Keyboard.
http://webemunes.comli.com/