I used iphoneringtonemaker from the first days it was available.
It was a good app. Paid my nine dollars and loaded my ringtones happily.
After the second to last update it just became too much work to reload my ringtones everytime I would sync.
So along comes Apple and Ringtones and I stopped hacking my iPhone and now have loaded over 30 ringtones through Apple. As good as the iphoneringtonemaker was it just won't be the path anymore for me and I would think some others as well. Maybe they can get the SDK and make one that we could use at a future date. I'll keep an eye out in March.