Only a couple small comments to add, you may want to consider centering the text in the upper nav bar, it looks a bit off balance with the arrows due to the shorter and longer text, centering may not be the exact solution, but the extra whitespace on the short words...
Also, IE6 1024, that wonderful new feature of IE6 of providing a download link for pictures is catching your "get plugged in" image. Perhaps trying to make it the background image for that block would solve this (css attribute background-image).
Also the images for your mouseover in the top nav bar hang for a second before changing, you could consider using CSS again to make the entire think a link instead of images, just define your colors to be the same as your image colors for the standard back ground color and the background color for a:hover. This would speed up tha transition.
Just a few thoughts,
-Tarwn
"If you eat a live toad first thing in the morning, nothing worse will happen all day long." - California saying
"To you or the toad" - Niven's restatement of California saying
"-well most of the time anyway..." - programmers caveat to Niven's restatement of California saying
(The Wiz Biz - Ri