I know it's not a so realistic hope, but who wouldn't be happy to have a symbian emulator on his PSP?? Good news, nokia has released sources of symbian_ua S60 emulator used in the development for their phones under carbide sdk (don't actually know when...maybe they were always free and i didn't notice). So the eventual work to port this may be huge, but...who knows?! I just wanted to spread the word...
ps: thank you for the info, ruspa!