I'm 32, and I wasn't done having kids when I got separated. I told myself that I'd finish my new degree, work in my field for a year, qualify for mat leave, and have another child, either alone or with a partner. Now, it's been 2 years and my kids and I are settling into our own groove. I'm not in a rush at this second, as long as I don't see any newborns or think too much about them, and now I'm no longer 100% certain how I'll feel when my time line is up in 2012.
But if I hit 35 and still want another one as badly as I did 2 years ago? I'll go solo if my SO isn't still around. If I'm re-partnered on a permanent basis, I may go the natural route, but otherwise, I'll hit up a bank. One thing I've learned from single parenting is that I can handle this show on my own!
I do seriously have to stay away from the babies, though. They're awful for my self-control.