hmm, well in that case you can't do a lot with it besides watching video files mp3's etc, a fatter ps2 has its advantages..
anyway, as of now i can guarantee you will be able to play divX/avi movies , mp3 files, view jpg images, play arcade snes and sega genesis games on your slim ps2, because i know i have.
Btw for most of the above, you'll need to have a usb device thats on the compatability list in the first few lines of my divX article.