For those googling it, you can put custom ringtones on your Samsung Intensity by converting the mp3 to a .amr file. (Thanks for the mp3 ringtone lockdown, Verizon.) Anyway, go to media-convert.com and convert the mp3 and download it to the my_ringtones folder of your phone’s memory card (assuming you have a memory card.) You can then select it as a ringtone. (You could also use the newest Audacity beta and export to .amr file with the ffmpeg plugin.)
UPDATE: Unfortunately, the .amr ringtones turn out so quiet when someone actually calls you, that I found them unusable as ringtones. Funny how the phone’s built-in mp3 ringtones are plenty loud…almost as though they’re decreasing the volume on custom ringtones to make them useless. Anyway, if the .amr is too quiet when you play it, you’ll have to email it as an mp3 to your phone. Email the mp3 to email@example.com I had much better luck with this method. Yes, Verizon will charge you about $.20 to send a file. That was their ultimate goal I guess. Thanks again, Verizon!