There's a bunch of free sites out there that will send you songs, like
this one. They just send your phone a specially-formatted e-mail message that contains the ring tone information. When you get the message on your phone, it'll ask if you want to save it. Pretty straight forward. I found this by doing a google search on "3360 ring tones"
There's a lot of places that would like to sell you ringtones for a couple of bucks - don't go for it, there's plenty of free ones out there.
- G