Enjoy the list.
Play Console Games on your PC - Emulator DatabasePlay Console Games on your PC - Emulator Database>
More Emulation Sites:
Play all NES games online, no software needed.
Emulate ANY Nintendo console (besides the Wii)
As for the sites you have listed.. i personally recommend http://coolrom.com/, i have been using it for years and in my opinion it's the best option out there.
On the topic of emulation, it is honestly a little exiting seeing some developments in the emulation of the PlayStation 3 and Xbox 360, despite them being far from suitable for mass use i find that something is better than nothing and hopefully we will see some interesting things in the future