.What about the myth(?) that maybe I'm wearing too much clothing? Is there any truth to the advice I've read that sleeping nude keeps you warmer?[/QUOTE]

nope... the only reason your clothing would make you colder is because it is damp from presperasion or rain.
a lot of people (me included) belive it`s a good "double use" idea to include your clothing (or part of it, as needed) in your sleep system. ..tim