Even if you want nothing to do with Rails you should take a look at Rails Migrations because it is the best solution I have found to such a common development problem. The problem being how to make updates to your various databases in a sane manner.
Start with the quick screencast. Then check out this nice cheat sheet.
I know a couple of people are trying to figure out how to do something like this in .NET, if I had more time I would give it a try as well.
-James
