I've been using mRing since I bought my 650 with no issues. Minitones is a nice freeware app, but it stores the tones on your Treo. mRing and most, if not all, of the other commercial apps allow you to store ringtones on an SD card.
__________________
Jeff Velten
Sprint Treo 755P
My apps: 2Dial-4cast-Blue Nomad Security Suite-Datebk6-Diddlebug-Docs To Go-eReader-FieldPlus-FileZ-Google Maps-HandZipper-Hi-Launcher-KeyCaps 600-magicButton-mLights-MobileClock-mRing-Power Hero-PowerRun-pTunes-Quick News-Shortcut5-Snapper-SplashPhoto-TakePhone-TCPMP-TryDA-Unit2Unit |