Ok Sadish, here's my feedback.
The theme is tight and well rounded like one expects from an award-winning WP theme designer like yourself.
In my opinion, the main column is too wide, especially with such a small font. I think it is a big (impossible) challenge to write for such a wide main column, you would have to be Shakespeare to make the post look 'meaty'. Also, pictures posted wide would be too big.
In my opinion your new FasTrack theme could use a third 'track', a second sidebar to the right, which would make the main column narrower and give more commercial flexibility on the two sidebars. A 300px box could be placed on top of the two right sidebars. I can guarantee that the demand for a three column Fastrack like that would be phenomenal, just look at the real professional blogs, it's very difficult to see one that doesn't conform to this main column / two sidebars on the right design. Check out thesuperficial.com, autoblog.com, engadget, etc.
Also, the header and footer are too thick, especially with no breathing room at the end, they just connect to the end of the page which again, limits commercial possibilities (like adding a banner). The important links on the header are on a strip that is too narrow and close to the top limit of the page. Finally, IMHO the titles are also too small, users only stay for seconds on a blog, and they need bigger, nicer titles with more appealing fonts. Implementing nice fonts using the mikeindustries.com system would be a huge plus. Then there are little things, like I believe "send this post to a friend" link at the bottom of each post should be standard, etc. Another little thing, on the sidebar, the text goes too close to the right boundary, there should be more white and a breather there, especially since the sidebar is very wide.