Andy mentioned before that the Sustainable Food Center has free (donation suggested) classes on community gardening. I took a look at their website today and these classes look like they would be really valuable to us as we're getting started:
There is a 2 night class in April (Tuesday the 24th & Wednesday the 25th) 6:00-8:00pm called "Building Strong Garden Teams Training".
The second 2 night class is in May (Tuesday the 15th & Wednesday the 16th) 6:00-8:00pm called "Community Garden Leadership Training".
I went ahead and signed myself up for both the April and May classes - for the "Building Strong Garden Teams" class in April, they recommend that a maximum of two people from the same community garden sign up, to allow multiple garden teams to attend. If there is more than 1 other person from our group wanting to take this class, I can transfer my spot to you if you'd like. :) For the May class, they didn't specify any limit. They also have childcare available for both classes if you have little ones.