we're in a similar space -- http://www.getdropbox.com (and part of the yc summer 07 program) basically, sync and backup done right (but for windows and os x). i had the same frustrations as you with existing solutions.
let me know if it's something you're interested in, or if you want to chat about it sometime.
let me know if it's something you're interested in, or if you want to chat about it sometime.
drew (at getdropbox.com)