There is rumor that there might be a psp 4000 that keeps the umd drive, i'm not talking about the recently announced psp go, these articles are only about a week old:

http://www.engadget.com/2009/08/26/seemingly-solid-psp-4000-rumors-give-new-hope-for-umd-fans/

http://www.ubergizmo.com/15/archives/2009/08/sony_psp-4000_rumor.html

Anybody know details or interested? I've been holding out on a psp 3000 but i might have to hold out longer if a psp 4000 comes out (i dont give a crap about hacking).