Your content seems to be having a steady stream of updates and that’s great.
Layout is pretty standard, similar to sites of the same kind. Not really a bad thing but it wont get you any “wows” if you know what I mean.
Since acessibility is often tied to the layout, i would say the same thing about it. I cant find the option to categorize the tutorials while the site seems to let on that I could do so.
You should use less colors, so that it will become a stronger layout.
So i say: take your banner as the standard for the layout!
It looks verry cool and pro! Exept from the ads in it.
Dont think you should place the there… couse it becomes a bit poorly organized.
Just trow some kind of logo in the banner and place those ads in the main of the page.