Not sure if other's viewed the site in IE but the navigation buttons are a bit difficult to read, especially with the drop shadow. If you change the background color to a lighter gray, it may resolve the problem. However, I think the button color can be brighter and there is no need for the drop shadow at all.
From a navigation design and usability perspective, I have a problem with right-side navigation. In my experience, it is not the first place a visitor's eye travels to when viewing a web page. So, if they have to spend any time trying to get to your navaigation, I see a small problem.
On the free email page, I see no need to make the font smaller for the following:
Full instructions on how to set up will be e-mailed to you upon completion, please note it can take up to 24 hours for the instructions etc to be e-mailed back to you..
Additionally, you end this statement with two periods.
Guestbook page, text should be left justified, not centered and right justified for the form.
Joint Rollers Handbook, line spacing between rollover is inconsistent.
Links page, gray on gray for the links is difficult to read
That's all for now. I hope it helps.