I'm pretty interested as well. As I understand from reading, the angles of the gravers are really really important. Not sure how to get consistant angles.... looked at lots of diagrams but haven't figured out how to get them so perfect.
I have a graver sharpener jig around here. Not expensive, pretty easy to make something that would work as well, actually. Mine is like the 18 pound one on the last link.
The Bergeon one is nice, but pricey. The rig in the vid is easy enough an idea to adapt, and the stuff for grinding like that can be scrounged up pretty easy or bought, but is gross overkill for a fella starting out. Gotta remember that the folks (mostly, anyways) that are buying these rigs, are also charging out pretty big numbers for their time. The rig saves them time, it doesn't make them better engravers.
Lesse. http://www.jewelerssupplies.com/product3971.html
http://www.youtube.com/watch?v=2-fhCOXiyYc
http://www.rnhorological.co.uk/gravers.htm
Even easier to use something like the iron lap furnished with the Waller carbide graver sets, for use in a WW pattern (watchmakers) lathe.
Getting a sharp, clean angle without getting a bunch of facets or false edges in the way of the cutting, would seem to be fairly important. Not trying to do it seems pretty much a sure way to never build any skill at it.
Cheers
Trev