I just (one month ago) built up a rear wheel with an XT 36 spoke hub on a DT Swiss RR1.1 rim with some 2.35 DT Swiss spokes, brass nipples and had it tied and soldered. This wheel seems very strong (at least as strong as my OpenPro that I tacoed in a wreck). I am still running the OpenPro (also 36 spoke) on the front end. I am currently using "the Disease" (my bike) as a commuter/road bike (around 100 miles a week).
Take this for what it's worth, I haven't raced on it yet (duh!). I will start training here in Tucson in October (the training will just makes me want to move back to Oregon).
I hope this helps,