DD bought one of these in WS in Mexico on our trip in Nov 08. She had 8 (her entire first name) carved on her ring. There's a base price for the ring depending on type of metal you select (she chose St Silver), the width of the band, and the size of the ring itself. After the base price there is a per letter charge.
Along these same lines, years and years ago I bought a ring where a carver took a thin piece of metal and bended it to actually spell out my name. I loved that ring and have never found anywhere to do that again.
I'm almost certain I got it somewhere in Orlando, but it's possible it may have been at Universal or maybe even Sea World? Anyone seen anything like that?
I know that they have a stall at Seaworld near the the Stingray Pool/ Dolphin Cove that makes names out of wire. I am not sure if they do rings as well, but they do necklaces and bracelets.