The homebrew scene already has voip.......

Erm, does this mean the Japan mics will be different? How/why?

@Steven - yes it does, but I'd have a guess and say that the majority of PSP users are using the standard Sony firmwares. Homebrew is in the minority! Most people who want it (IMHO I guess not many though!) will want to use something that "just works".

My Mobile radio has two settings for Mic (labelled 1 &2), to suit European or Japanese speakers. The "wlong" setting does sound worse with european speakers.

So a mic for Skype in Japan may indeed be different.