Ringtones can be added to the blackberries by e-mailing yourself a
link to a midi file on the internet. Or browsing to one with the
blackberry browser.

Lets say you want to add a Rolling Stones song. Just go to
www.google.com and do a search for Rolling Stones midis. Then find one
you like, right click and copy the link location and e-mail it to your
phone.

Don't put the word ringtone in your search otherwise you'll be pulled
into sites wanting to sell you the ringtones.

There is also a site on the net that has ringtones for free for
blackberries. It is http://www.8ung.at/drmsushi use the monophonic
ringtones for the nextel models.  The polyphonic ones *may* play but
probably won't sound right.

Blackberry also has some free sample ringtones at
http://www.blackberry.com/browserdemo/dpbw/ringtones.html