That’s right, get it for free. Plug in any MP3 and mark down the start and stop time and it trims it down to 30 seconds and exports it to iTunes:
iRinger :: iPhone Ringtone Factory
Works on nonJB’d phones too 
Re: Free ringtone maker for iPhone
but ofcourse its gonna work on non-JB'ed iphones as well. thanks for the share homeboy, in the past i have had ringtones put in iphone manually using itunes and trimming down to 30 secs