My Specialized Enduro runs about 30lbs in hardcore XC form, currently I've set it up for the Whistler bike park so it's 34lbs.

My Nicolai Nucleon ST is a whopping 53lbs!!! I plan on swapping out a few parts to bring it back down to 49lbs pretty quickly (it's been down to 47lbs) but as I'm not a racer I'll deal with a couple extra pounds if it saves me some cash or is more reliable.