Pimp Streamer
Finally found an application that I've been after for a while for my PSP. I found out about it listening to a podcast on the way home from work last week. It basically allows you to stream movies to your psp. So if you want to watch a movie on your psp whilst your in range of your wifi network, this program saves you the hassle of converting the movie and copying it to the memory stick.
The program consists of two parts. Some software for the psp and some software that runs on a Windows Machine. The PSP software has a .ini file that you have to edit to include the IP address of the Windows machine that is running the host software and on the Windows machine all you do is run this software and point it at a directory that contains the movies or mp3s. The software has the relevant codecs for most .mp3, mpeg and avi files.
Initial tests show it to work really well at home. I havent tried it over an internet connection whilst I am out and about but I have heard that at this point in time it doesnt work too well. Still its early days.
Thanks for a great app for the PSP :)
More info at http://pimpware.pspstart.de/