What are the best photography groups on flickr for feedback?

I have just started a flickr account for my photos and would like feedback on what I am doing right or wrong. I am not a professional and at this stage I do not photoshop my shots. I just want to a few tips. What are the best groups to join?

[2mnycars]

Some of the forums at dpreview are good. Depends on gear you carry.

Canon? google photography on the net It is a great forum with active participants.

Others? there are forums for Leica rangefinder cameras, rangefinder cameras, and large format cameras...members are serious photographers and skilled.

DaveL