Looking for a free program that allows you to trim mp3s without losing quality by having to convert them to wav files first? Then Mp3Trim is your new toy. It's free, it's easy to use, and it does a lot more than trimming if you want it to. Add fade ins/outs, normalize volume, even clean up bad data within the file if that's your goal.
Thanks to Mike in Michigan (again) for the tip! Mike's on a roll!