As reported earlier, Skype will be available exclusively on PSP-2000 systems only. The revised handheld features additional RAM, previously used for UMD caching. According to Nick Sharples from SCEE, the additional memory onboard the new PSP is crucial for running the VoIP application. He told Pocket Gamer: "We had studied the possibility of supporting Skype with PSP-1000 but had to give it up because of the smaller size of main memory on PSP-1000 series."
Skype is coming before month's end. For more images of the application, visit GPara. For those with homebrew-capable PSP-1000 systems, new homebrew VoIP applications may be worthwhile to you.