J.L.
There are two groups I know of. One of them is at the Birth Center in Wilminton, DE. That's a great group of ladies there. Check it out at www.thebirthcenter.com and give them a call.
The other one is at St. Francis Hospital (which is across the street from the Birth Center). That one is called the Blue Angels group and I think it's more of a support group than a mommy and me group, but it could be worth checking out. You might be inspirational to some of those new moms.
Good Luck!