Hey, your ringtone sucks. Yes, yours.
Here's my favorite website of the week: http://mobile17.com
After creating a free account and specifying your phone model and provider, Mobile 17 allows you to upload any mp3 you like, specify the start time & duration, and they will create and send you your new ringtone. Did it work for me? No, but my LG 6000 is from somewhere in the Cell Phone Mesozoic era (2004).
They also offer graphics and animation work, and delivery methods differ depending on your phone & provider. Its time for me to upgrade, and then you'll all be rocking out to my official theme song...The Rowdies.
3/23/07 Update: I've switched to the Samsung-t629, and this site works really well for me. Enjoy