I'm seriously toying with the idea (i.e. dreaming for well over a year now) of getting a Surly Big Dummy if I can find one in my size.
Problem is I've only got room and permission for two bikes, so would have to sell my 29er to fund it (the other is a cross bike)
I ride a lot round town/tarmac but do 'just-about-once-a-week-if-it's-nice' xc ride locally is mostly double track and field edge single-and-a-half-track that you get round here.
I've seen blogs/blurbs saying you can take all the gubbins off the back and it'll do some light XC .. is this true, I understand it'll handle slightly different and yes it's heavier but my current 29er weighs 31 lbs anyway.