An organic approach is just fine.
I "took the helm" of a small group of local small hi tech folks (New Media Group) earlier this year.
One thing I found helpful is to *suggest* some topics (and let other suggest some topics) via the email announcement. It's like having an agenda for a meeting. That might drum up a bit more
attendance.
But that might also work better if you delayed it til the group has "gelled" a bit more.
-Clay Nichols
Bungalow Software
http://www.BungalowSoftware.com
Speech & Language Software
(540) 951-0623