Well, I went ahead and hacked together 2 more phpblocks, you can see them on the front page of this site on the right (and shoutbox is on the left).
The first one I'm using to display my latest screenshot, but this could be used to show any thumbnail and link to a larger image. You could create your own random image grabber...
actually i might do that soon.
the second is just a listing of my screenshots directory. you can limit the number of entries you want to list, here I show 10. but you could limit it as much as you want.
If you're interested in seeing the source you can check out my lib-custom.phps here