Sanyo MM-5600
DataPilot Supports MM-5600!!!
I find it easier to just download voice ringtone from dbRingers or some such place.
http://reviews.cnet.com/Mobile_Action_Handset_Manage ... »
If you check out this site you'll find they do support the MM 5600. However, I'm not sure it's as good as the DataPilot.