Nice. I like the text and really love the block headings. Maybe add some more detail in the general heading though. The oragne tab looks quite good, but the general tabs seem to be missing some depth.
I do like it, but got two things I'dd change .. First is the space between the first and second column, I think it's to big .. I would have made it as big as the space between the Login box and the Article box .. Second is mayb just something you forgot or something, but the 1px border around the content boxes are all blue ... It's a small detail but I think it would look better if they got the same color border as the header of that box is ..