In an attempt to rectify any light panic I may have caused those waiting for this when I suggested that Skype for the PSP had been cancelled I would like to point out that it is in fact available today everywhere, except in fact Japan,. Yes, that's right, as the addendum to my original over-rapid reaction stated the delay was a Japanese affair only and thus anyone owning a PSP Slim & Lite console can today jump on firmware 3.90 and into the Skype action.
As I have previously mentioned, the functionality added enables users to sign up to Skype's service and then use it as they would on a PC - or near as damn it. Having had a quick play with Benny's PSP Slim & Lite I can confirm that Skype does appear to work as advertised and, dare I say it, the interface looks pretty much perfect - but as they say on the goggle box, your mileage may vary.
Also included in the 3.90 firmware update is Go! Messenger which, as you might predict, will enable PSP users to chat to each other but, so far as we can establish, is actually just a placeholder right now, you won't need another firmware update to get it though. If that doesn't float your boat then perhaps internet radio will? The service is powered by Shoutcast a free web-based provider. The quality is pretty impressive so the only caveats are finding a web connection and navigating through the quagmire of Scandinavian rave-pop stations to find something a bit more, shall be say, conventional.
As I think I already said, you can grab firmware 3.90 right now but you'll want a Slim & Lite PSP to bother because all these new features are excusive to that model. I expect there is an argument for this involving the increased RAM size or some such blurb, but if you ask me, it's a pretty neat way of forcing upgrades - luckily they're probably worth it.