How Can I Use a Script to Create a Sequential Series of User Accounts?

Hey, Scripting Guy! For purposes of testing, I often need to create multiple user accounts like this: pgeorge01, pgeorge02, etc. How can I write a script that automatically creates the next account in the sequence; that is, pgeorge03?-- RG Hey, RG. You know, after our last experiment went horribly, horribly wrong, we vowed never to get involved ...