Well, the 3.0.x version relies only on ImageMagick, BUT 3.1 which is due out today or tomorrow will utilize php's built in GD, so users wouldn't even need to go through the installation of IM to get it to work.
Also dave, coming up very shortly is a free version of PhotoPost, it lacks many of the high-end features for large sites, but when that comes out you could get your hands on it and see how the program basically works and possibly build from that.
I just see photopost getting pretty big fairly quick, and even had someone compliment my site with PP and UBB.T and was asking me if I would sell my index code, I told him it wasn't mine, but you created it and its free to use if you have UBB.Threads, etc.
I know casper has the pal already made to display a random image, which is really cool. I just need to take it a few steps further is all
