This group sort of fell apart early due to lack of participation. I tried to be the organizer but it just never quite came together. I'm now about 3 months away from delivering baby #2, and with a 1 1/2 yr old I think I have my hands full for the time being.
But the play group idea is awesome, we've been involved with others and have met some great people. If someone else would like to be organizer, this website is a great way to do that (and free, some of the others want to charge a fee...).
Please let me know someone is interested in being a group activity planner!