Thanks for the input guys, I just weighed my Kaitai and it comes in at a hair under 29 lbs. That's with an underseat pack and (I think) tube liners in the tires (had a problem with pinch flats years back and that seemed to help). If I swapped out the Judy XC fork for something lighter like a Sid, and got a 2nd set of wheels with street treads on them, how much do you think I would drop? Not sure what your Zaskar, Dave, or some of these other commuter bikes weigh - it would be nice info to compare.
And yeah, Dave, I saw your Zaskar ad, recognized the triple triangle design like my old GT Timberline had. Do you know how much it weighs?