Lurking on here per week around 3 - 4hours.
Plus posting etc, 4hours maybe!
Checking AW for possible new WG's, booking, chatting and research = 10ish hours a week..
Travel time to and from WG's = 3 - 4hours a week.
Punting time between 4 - 8hours a week..
I have no idea what the percentage is but when I look at the above it appears to me like a full time job!!