Looks pretty good to me, although I’d say the text is a little small. (But we just change to 1280×1024 rez so I could just not be used to it yet.) One thing I noticed is that you seem to have multi authors, yet the posts don’t say who wrote what. Scratch that, looking again, I see that your categories are the authors. It’s a little confusing to see the author as the Filed Under.
On your contact page, the right side of the input box doesn’t show.
A home link would be nice too, for those who don’t like to use the back button.