PSP has been hacked!

Yes it is true this time. The first homebrew PSP program: Hello World

http://pics.oopo.net/2005-05-05-HELLOPSP/

Details on how it was done are sketchy. Most likely involves some SDK stuff to get up and running however the file itself does not use the SDK, and you can download it here:

http://anon.ug.to/sec/index.html

Also note that this currently only works on Japenese 1.0 PSPs