I just found this site which is pretty cool:
http://people.hofstra.edu/faculty/Stefan_Waner/diff_geom/tc.html

Section 6 has quite a bit on verious metrics. If you can understand the Riemann curvature a little later then you'll know just about everything about curvature (and definately more than I do)

A less mathematical (but the worlds greatest living mathematician is on the author list) is at

http://hilbert.dartmouth.edu/~doyle/docs/gi/gi/gi.html

towards the end of the page is a section called "Curvature of Surfaces"

[edited by - sQuid on April 8, 2003 2:02:31 AM]