The above comment sums up the site content, it needs spicing up. Dont use gradients as someone else stated, use some nice soothing pastel colours, with maybe a bright contrasting highlight colour in very small doses.

The structure/layout is ok except the firefox navigation bug.

Get rid of the internal scrollbars on the longer content pages, if you want small pages have a NEXT link. Or make people scroll a wee bit.

Code validates, but I would love to see this as a tableless design.