Keith

Some things that i would do...

Change the background picture (or expand so that it covers a larger area). At the moment, on browsers here, due to the screen resolution, i can see that the image is tiled.

Also, i would not have the initial 'splash' page as you have at the moment. The page that this links to is much more informative to the visitor.

Other than that, it is very easy to use the site and browse around at the various pages etc.

From a search engine friendly point of view, you could remove the frames, but that is only if you want to attack the search engines.

A nice, informative site.