I'm totally not a Mac guy, but the newly-announced
Mac Mini is super cool. It's even more stylish than the G4 Cube. I'm daydreaming about buying one as I write this.
Update: The honeymoon's over. The Mac Mini looks cheap, but after you add enough options to make it usable (wireless, bigger HD, more RAM) it winds up costing about twice as much as the advertised price. It's got no slots for expansion (say, a cheaper/better wireless card than Apple offers, a video card, or a sound card). It's got a slow, expensive laptop hard drive. There's only one slot for RAM. It will never run multi-monitor, and there's no digital audio out. And while it includes a 56k modem, both Bluetooth and wireless are fairly expensive add-ons. I don't know who the Mac Mini is aimed at, but I'm pretty sure it isn't me.
If I want another SFF computer, I'll probably wind up with another
Shuttle, or a
Hoojum. Or, if I want a Mac, it'll be a laptop, or something off of eBay (preferably one with the
round mouse that was modeled after a river stone--call me crazy, but I like that mouse).