Since everyone (well, it seems like everyone) is talking about grounding and stuff, I went to Lowes today and bought a grounding rod, clamps, and #4 wire (I guess you call it wire, it's more like a copper bar).
Because of the way I have the clamps holding the mast to the post now, I couldn't get the grounding clamp on the mast.
I put the wire between the clamp that was there and the mast and hooked it up to the grounding rod. The next time I have the mast down, I'll try to remember to put a little more distance between the mast and the post so I can the the grounding clamp on there and do it right. Hopefully it will work as is.
Greg