This is my first upload, so please be gentle :)
In a nutshell, I created this program because I wanted to rename my MP3s and I didn't want to have to do them all by hand. I did find another program on the Internet, but I thought it was kind of chinsy, so I made my own. This program lets you browse to a specified directory, and rename any MP3s you want there to match their ID3 tags. It does error checking for invalid characters in the filenames, duplicate filenames, and MP3s where the entire tag is missing.
For more info, download it and look at the help dialog. Hope you like it!