Here are some useful travel web sites from The Scobleizer.
Personally, I'd be more interested in some useful travel less sites. I'm wanting to cut both footprint and wear-and-tear. (Though I think Tripit is particularly cool.)
Be that as it may, I'm on the road again: Santa Monica this week, Las Vegas next, San Jose (ok, that's local) the week after... then staying close to home for the High Holidays... then Pittsburgh in Oct. And more to come. (Find out where and why on the Natural Logic events page.