good advice from Gavin.
I'll add my bit and say ... get yourself a nice logo ..
.. the green / blue colours are a bit harsh
You're using a table design for something quite simple
Change the adsense background color so it doesn't stand out as much
Seems to have a lot of useful info though some pages can seem a bit long .. maybe split them up even further ..
More pages / different pages titles shouldn't hurt with
SEO either