I have, at least, two remarks,
1) you use css for the A-selector, but only, as it appears, for A:hover (and maybe A:active and A:focus). You should, I mean, you have to create a style for A:link and A:visited (those can be the same without a problem). For now, you have a fancy rollover effect, but no 'default', which makes it a bit painful.
2) you should make your little navigation table below more present: maybe put it in a separate frame that always remains visible, like I did
here
3) Your alignment!! what is that all about? This needs no saying.
I think some of the more font-minded people around would also have a remark on that, I, personally, haven't been round long enough to know.
Good job anyway.