I just happened across this.
Of course, as luck would have it I don't need to do it anymore, but that would have been perfect.
I ended up putting them in one of those wooden corner desks that have a couple of spaces for a small tower, and adjustable shelves if you
don't have a tower. It ended up fitting one Mini with 2 LaCie Mini sized drives under it, one Mini on an
H-Squared shelf mount (with LED bling, of course), and then the UPS for both is sits on the shelf.
The tower space on the other side holds my ethernet switch, NAS, and its UPS on the shelf, as well as the transformer blocks for the Minis and my monitor. Probably one of the best setups I've done, especially WRT cable aesthetics. They're effectively invisible. I'd post pics if it wasn't under a mountain of crap at the moment.