I’m in the minority here, but I like my celly to ring like a phone, not like MTV played through a tin can. I still think there’s a market for “phone” ringtones, but nobody’s biting. In the mean time, here are a couple links that contain a pretty decent collection of actual rings.
http://www.dence.net/oldphone/
http://www.davidenglish.com/ringtones.html
I’m using “Old Italian Phone” from the first link and it sounds pretty decent on my Nokia 6682. It’s got that old phone sound with a little electronic-ness in there which takes the edge off, and it’s unique enough so I know it’s my phone.