Over at the official PSPUAE site, PSPUAE site admin FOL gives a progress update of the now-in-development PSPUAE v0.63.

The report says that they've been thinking of ways to utilise the Media Engine (2nd CPU of the PSP). However they add that running sound from the ME, might be dumped as it doesn't seem to yield any benefits.

They're also thinking about moving other functions to the ME. They hope that this will lift the load on the Main CPU, and he hopes that it will increase speed that way. They're thinking of running half of the Screen Rendering on the main CPU and the other half on the ME CPU.

They emphasize that since they're concentrating on optimizing the speed of PSPUAE, it will involve a lot of coding and that we shouldn't expect a release for at least a month or two. They ask users to be patient so just sit down and relax for now. We'll update you guys once we get more info from the team.