i have always wanted to make a shuttle, looks like fun :)
I've built nearly a dozen Shuttles (alas for others). I love every one of them, going back to the Athlon 2500 days, and dual onboard video. My most recent one included a Raptor drive and a SATA DVD burner. Windows installed in about ten minutes and boots from power off in 15 seconds.
In addition to being cute, they are much easier than mid-tower cases to assemble and upgrade. Maybe hard to believe, but true.