jacksonriding7 - Thanks for all the info! I'll look into sag and pitch for sure... the bike came from the dealer in ’08 and has never been adjusted to me as a rider.

I brought it to work this morning (about 25kms)... loosened up on the grip somewhat, paid attention to my center of gravity and it seemed to be fine. I have a sneaking su****ion that it is a combination of possibly sag and pitch, and me adjusting my riding position given the weight loss and loosening up on the grip.

it wasn necessarily the wobble itself that i was concerned about - it's the fact that it wasn't there before, meaning something possibly changed (even if it was just me as a rider)... it would suck to figure out it was something with the bike by the wheel flying off or something like that... hahaha

Thanks to everyone – this site proves to be invaluable over and over to me as a newb - if it turns out to be something significant, i'll post up. but as most said, it's probably just me.