I believe the standard route to whack off of West Bond is to follow the ridge out to the end then continue more or less straight down to Hellgate Brook and follow that downstream to the Franconia Brook Trail. I've never done this myself though.
If you're planning a loop over the Bonds with this whack, I recommend whacking up West Bond then taking the Bondcliff Trail out rather then vice versa for two reasons.
It's gets the the whacking done in the early part of the day rather then risking it after dark and whacking up a mountain is easier navigation wise and safer then whacking down a mountain...imo.
A couple alternate routes to West Bond.
http://www.vftt.org/forums/showthread.php?11131-The-Bonds-A-HELLgate-of-a-hike-1-28-06
http://www.vftt.org/forums/showthread.php?14843-West-to-East-Pemi-traverse-to-be-continued