I'd like to limit multisite blog names to city names?

I would like to restrict the names that can be chosen for the creation of a pro-site, to be names of existing cities in the U.S. I have a text file with tab-delimited city/state information, including postal codes, which I could incorporate into a mysql table. I also have a book on creating wordpress plugins, and I know how to read, but other than that I'm a novice :slight_smile: I've searched widely to see if anyone else has done something similar to this, and am surprised that nothing has turned up. I'm wondering if any of you guys with more experience could help me get started in figuring this out.