My tuppence;
1) that is an über fugly box. I wouldn't buy it regardless of the innards. I just couldn't bring myself to look at it. It's about as aesthetically pleasing as a public execution.
2) speculation is rife that the Mini is about to be bumped to the GMA965 chipset with X3100 graphics in line with the Macbooks, rendering this machine obsolete by comparison as soon as the bump occurs. They would have done much better to base the box on the rumoured imminent specs rather than the incumbent specs.
3) it's fugly.
4) regardless of the actual legality or illegality of preinstalling Leopard on the unit, I only hope this forces - or, more likely, coerces - Apple's hand to bring out the much desired xMac so that the job is done properly and fully supported hardware is used, not some ropey "let's try and make a fast buck out of a hacking community's efforts" patch job.
5) did I mention it's fugly?