I think you should take the advanced category down until you at least have some article in it. i also think you should link to the home page from all internal pages. SEO & SEO forums is a hyper saturated market and you really want to have something that sets you apart. Shawn has all these cool tools some of the other forums have other special or extra stuff its also really hard to build communities, but if one works hard enough they can do it. you may want to register in a few directories such as BlueFind to help build up your PageRank off the start.
A glossary and a site map might be useful. I know there's a big text link for the home page, but I was still looking for the site map link and feeling lost..
Looks good to me. Only suggestion I have is to perhaps add a few more colors in there besides the blue.
There's red in the Google ads! Clean and simple nohaber - not fussy and all the more elegant for it. That combined with the no-nonsense articles should be a winner. Mick
I think it looks a little borring site. Maybe you can add colour, picture, logo, etc to make it more interesting.