I have been using this site to upload my personal ringtones that I have created using the instructions and utilities in the other ringtone sticky. Please search for it if you don't know what I am talking about.

http://inevitabletruth.org/blackberry/ringtones/

It is simple, clean and quick loading because there is no fluff. You can upload from your PC and then download from your BB to get your personal ringtones on your BB with little trouble.