You will not have to wait for PSP skype headset any more. Because Sony has finally brought its Skype-friendly PSP headset to US retail stores. It's undoubtedly the easiest way to get up and running with Skype and in-game voice chat on the PSP, since it used to require two separate accessories to pull it off. If you are Skype curious, be sure to check out how to guide over at PSP Fanboy.
However, it won't work with those original fatty PSPs, and now it can be found at $20 in the US market.