make your own using the app 'Ringtone' or 'RingtoneDJ'..., they have to be less than 30 secs long.
Any existing ringtones needd to have the extention *.mpr ( if they are made from mp4 files you can simply edit them changing the extention to mpr.
Any ringtones with the extention *.mpr can simply be 'dragged and dropped' into your iTunes library into 'ringtones'
Then select add all or selected ringtones to your iPhone at the next sync ( this can now be sync'd over your WiFi using iOS5)
I did these steps but have two questions -
in my itunes list is says "tones" and the ringtones are in there. Is that right?
Secnd, after what looks like a good sync, I can't find them in my phone. Where are they?
thanks a lot.