Thanks a lot! I've already updated the Facebook and Twitter images. It's always bugged me how grainy those images were. The admin who used to do all of our creative graphical stuff, JJE, hasn't been active for years. He's the one who originally made our forum theme, our inactive/queued/suspended pages, and pretty much all of our banners and icons. Thanks for helping out.
If you like doing this sort of thing, one thing that a lot of people ask about is those "Hosted by HelioHost" type images that people could put on their sites in various sizes and shapes.