ABCAudio - easily convert WAV to MP3
Website - ScreenShot - Download - Freeware
While I was checking into music format converters, I ran into this sweet little program. Once installed, it's simple to use. You just pick out the WAV file or even an entire folder. Then you tell it where to put the files. When you are done, all the WAV files are converted to MP3. The program also has quite a few options for doing things the way you like them done.
Tip from Clif:
To turn this into a portable application, do the following. Install it normally. Copy the program folder to another name. Next uninstall the program from the Ad-Remove control panel applet. The copy of the program that you made earlier still works fine and you can even move it to a floppy disk or thumb drive to use it on the road.
Quote from the website - ABC Amber Audio Converter is a useful utility which helps you convert wav files to mp3 files (or mp3 files to wav files). The software supports a batch conversion, a run from command line, more than 50 languages. Batch conversion ability allows you to convert a unlimited number of audio files at a time.