Find/Unrar/Delete Script

I'm a PC convert, and quite novice when it comes to shell/bash scripting, but I really want to learn/understand more. My need: I need to be able to scan a folder, find any .rar files, extract the files in place, and delete the associated .rar afterwards. Each may also have the .r00, .r01, ... files associated, so those need to be deleted afterwards as well. Can someone help me figure out (and understand) how to write a script for this? The more comments, the better.