I've got my PS2 running a NES and SNES emulator off the HDD connected to the network adaptor.

Does anyone know where I can find a good Sega Emulator (.elf) as well? I've got the roms, I just want to play Sega games as well.

Best place for emulators:

http://www.emulator-zone.com/

Damn near anything you can think of there.

Opps I don't know where to find PS2 Emus, just these and Xbox ones (http://xport.xbox-scene.com/)