I have downloaded many ringtones for the 7150 from the DRMSUSHI web site. I would like to know if there is anyone out there in the Blackberry bush that is aware of a third party application that would allow you to save and play multi and polyphonic ringtones on the phone. Thank you in advance for any help with this.

I've never seen one and I don't think one exists..

In theory (according to the developer's response), RIM had instructed developers to start preparing multiphonic ringtones, with the expectation that upcoming device/OS support will be there...