I sat on the fence for a week or two after the Mac mini announcement myself. The two things that pushed me off the fence were: (1) Wanting to try out Mac OS X Panther (now I get to learn about Tiger soon, I guess for yet another $100 or so) and (2) curiousity about GarageBand (now I need to buy an inexpensive USB keyboard for it...btw, any opinions from anyone on the Edirol UM-1SX USB-Midi Interface? I have some old MIDI keyboards lying around).

So far, I'm pretty happy with my decision to try one out.