I keep my RG account mainly for the "request full text" feature (which actually works very rarely). However, the activity over there in area of Bioinformatics seems to be as large if not larger than here. Are you an active RG user? Can you comment on their Q&A system? I had only answered once, the person who asked the question deleted my answer without any comment, so (obviously discouraged) I gave up. But I'm interested in opinions of others.
Dr.Mohd Deeb has invited you to join ResearchGate please follow this link: http://search.wikileaks.org/syria-files/?q=Researchgate
Gosh, Michael, I know RG is a spammy service, etc. Nevertheless in some areas outside of bioinformatics (but still science) it's quite a good source of knowledge. I don't want to prove RG is better than BioStar - I want to know if anybody invested enough time in their forum system to get informed opinion on it.
Sorry, I couldn't resist it xD (but maybe ill keep that name btw)... Hope someone has something serious to contribute.