David, I tried to post this last night but my ISP would have no part of it. I think you are doing things right. Your navigation is excellent and I like the idea of not overloading the site with graphics and a background image that makes it impossible to read the text. Amazing info too. So many sites these days are all sizzle and no steak.
If I can ever help just holler.
P.S. ___ For what it is worth I did think about putting up a sexy woman's pic on our site to encourage return visits but could never decide between Granny Clampett and Granny from "The Outlaw Josie Wales" :-)