All new Sprint phones will play standard MIDI files. Save them on your computer and upload them to the web using a site like www.pcspix.com. Once the files are uploaded to your PCSPix account, you can access them from the web using your phone.
I'm such a dork about my cell phone. I have specific ringers for each person. If someone is showing up that's not in my book, it plays No Surprises by Radiohead. Other ringers I use are Rapture, Atomic, Our House, Da Funk, Jenny 867-5309, Just Like Heaven, and Talk Show Host. I'm probably the one annyoing Nag in Pizza Hut or during an exam.
Speaking for all of the Best Coast Wieners, I must say... It's only an earthquake. Get over it. Life goes on. Call me when you get something truly disastrous, like a football team that can't win on the road.