I really like this PsychCentral the best as far as communities. But here are 2 sites I find are helpful for researching psych meds before making a change. Obviously need to take into consideration that more unhappy users will report on side effects because the ones that feel great on a med are more likely to be out living life. Still many of the reviews are fairly balanced and I just like reading other's experiences before agreeing to a med change.

Ask a Patient - askapatient.com/

iGuard - iguard.org/