I had almost settled for the lightest WBBB, a 3-season Yeti and a SuperFly. Seems really comfortable, but quite a big investment.
Ultralight Skeeter Beeter at $60 + Arrowhead Jarbridge is a very cheap solution, although the reviews of the Skeeter Beeter are very mixed.
It says on the Dream-Hammock website for DangerBird 60: approx 30.65 oz. for single layer and 46.3 oz for double layer. Says nothing about size though.
EDIT: Checked out the Baby Orca - it looks so thin, does it really provide any insulation?
I'm also wondering how it can be OK not to cover your feet with these mini UQs, such as this and the Yeti. Cold feet sure makes me uncomfortable in a hammock.