I hover at about 195 LBS, on a 5'8" body, but I can top 200 LBS at the smell of a bakery !
I ride a 2004 Sequoia Comp, with 16 spoke shimano wheels (WH-R540's). Lot of rough pavement miles on those wheels with no trouble and no signs of rim cracks. They are not all that light, compared to most low spoke count wheels though.