There's really not much to say for any emulation of recent consoles on the PS3. It's just not going to happen due to having to code for too many threads and bizarre architecture.
All the decent emulators that get ported to the Xbox 360 for example are are straight ports of existing emulators for the PC.
For any decent speed the PS3 would need emulators coded from the ground up for it. Which is simply not going to happen.
nullDC was never going anywhere, we all knew that from the beginning.
...sorry guess you're not asking that....