Looks good, but a couple of things struck my eye:
-As above said, the bottom is too big, black and wide, it draws too much attention to itself, and the fact that it is black makes it blend with the sidebar in a weird way.
-The left side of the site looks a little ragged, the indentation jumps a little too much in and out, try aligning things a little.
-The right side has the same problem, the search field, the "Search site" text and the "…pixelated coffee" needs to align with the right edge of the black box below, or the other way around(which would probably be better).
-I don't know if im correct, but does the right side of the top have a larger padding than the left side?
-The search field looks a little tacked on, try making it darker and give it a white gradient in the top so that it blend into the style of the site a little better (flow it with the gradient that goes from one side of the site to the other). Also, the "Search Site" text looks like a button, but it isn't, i thought i could get to some sort of advanced search because of the drop-down arrow. Why not put the search input field where the "Search Site" text is now?
-The coffee that flows down to the sidebar is a cool effect, but its looks a little too blurred, but thats probably a design-taste thing. Im just thinking that you have no other graphic items that has the same feel.
-The gradient border on the images isn't me, but then again - thats just my taste hehe.
-When the main paragraph of a topic in the main part of the site starts with a quote, the paragraph text format look wrong (it doesn't change enough, it doesn't look like regular body text), either make it more like the body of the other topics, or change it so that is differs more from the other topic.
-Isn't it spelled "Advertisement"?
Besides that, cool site dude, its just minor things hehe
Good job!
