Ads above header not needed.. It is ruining your blog's look, seriously. For the latest posts according to category, try removing the author name and time.
Very clean looking, it needs a few minor touches but other than that it is great. Logo image is broken.
I think the layout is a little busy... look at sites like mashable.com and endgadget.com, when you analyze their layout it's pretty simple and in a "tumblr" format...you should look into something more simple
quite a nice site. You might want to look at cutting down the amount of "noise". Maybe think of a nice logo on the header
Looks good though you can make it look a bit more concise and clutter free. Quite a lot of information I must say. Need some work on the title and logo, basically the header part.