Well, here is my modest little collection. It pales in comparison to others on the site but one day... Sorry for the lousy picture quality. My camera died recently so all I have is the lousy camera on my phone. I'll update the pictures at a later date when I have a better camera. (Edit: Pictures updated)
My game collection minus three games that don't have cases (Ecco the Dolphin, Sega Bass Fishing 2, and Dynamite Cop).
My controllers with matching VMUs as well as a couple rumble packs (including a slightly discolored Mad Catz one), and the Dreamcast microphone (which was included with the brand new copy of Alien Front Online that I bought).
My other controllers including my awesome Japanese mini keyboard and mouse.
And last but not least, my Club Nintendo VMU holder!
I didn't get a picture of my actual Dreamcast because it's in a room with lousy lighting (cloudy and raining outside) and I didn't feel like moving it since it's all hooked up nicely.
Update: Here's a tour of my game shelf!