Wow, that looks great. I was thinking of either a scoll look or a stone look (maybe a stretched out scroll on the bottom and stones on the side), but I like your all stone look.
If you can easliy do it, a dropshadow on the fonts might make them looked etched in the stone, and you wouldn't have to bitmap them.
(I did that once back in the day when I thought I was a programmer on my Amiga. They didn't have dropshadow fonts, so I drew the font twice, once in black, and then once up and back two pixels white for depth.)
Just a though...
Looks great. Thanx!!

desiv