Here is a free online BlackBerry ringtone generator that you can upload a song to and create a ringtone that you can download and play on your BlackBerry. The service, CellSea.com, isn’t just for making BlackBerry ringtones, as it supports the following formats:

  • MP3
  • MIDI
  • WAV
  • M4A
  • ACC
  • MP4

[Via BlackBerrySync]