Really interesting thread, thanks all for your contributions.
I've had a pair of Vibram FiveFingers for a few months, and have put a couple hundred miles on them. While I liked them at first, I don't think I'd recommend them anymore. The toe pockets make my toes sweat more than normal, which seems to cause more blisters than I get when running/hiking in other minimalist footwear. Also, while they fit overall, individual toe pockets are too long, causing them occasionally to buckle when I'm moving over irregular terrain. Finally, when I'm off trail all sorts of plants and sticks get caught between the toes, forcing me to stop constantly to pick them out. This never happens when I walk barefoot, so I can only attribute it to something about the toe pockets' spacing and rigidity. I will not buy another pair, and cannot recommend them.
I looked over the Russel Mocs page. I know a few people who have the stalking-type boots, and reviews are mixed. Traction is poor, the soles are anything but thin, and while feel is better than with a lug sole, friends who've shelled out the $$ for them can't be remotely as quiet as me in a pair of $40 water shoes. I haven't worn their minimalist models, but at $250+ per pair I guarantee I never will. You can buy multiple pairs of good minimalist footwear for the price of a single pair of custom "minimalist" Russel mocs.
On a positive note, I do own two pairs of Teva Protons, which have held up to running for a couple years although the pair I bought first is nearing the end of its useful life. They do poorly as running shoes when you try to wear socks, but work reasonably well when you don't. They are neoprene, though, so are always hot, except in the winter when they're just right. Unfortunately I don't think they make Protons anymore, and have replaced the line with something with a higher top. Maybe that makes them better, although if they're all neoprene it will certainly make them hotter, which is no good for spring/summer/fall use.
I just ordered a couple pairs of Soft Star RunAmoks. I bought the ventilated version, one pair with the thicker (5mm) treaded sole for non-urban environs and another pair with the thinner (2mm) sole for urban environs. After reading a few reviews on-line, I have high hopes for them. They offer a leather version that looks awfully attractive as a hunting shoe. I'll let folks know how I like them.