This doesn't really count as "light" (and I will try my best to avoid the thread deraillment that questioning the need for a "light" seatpost would entail...oops, did I do just that?) but I've been very impressed with the Salsa Shaft when it comes to an easy-to-adjust, versatile, well-made seatpost. My wife has them on two of her bikes; if I wasn't lucky enough to be a set&forget kinda guy I'd have them on all of mine too.


[edit: Hmm, looks like it's no longer listed on the Salsa website... disco'd perhaps? That would suck.]