I like the slanted pie, but the "F" thing wasn't evident to me - the lower horizontal line of the F actually looked like a mistake in the drawing - it looked like there was another pie chart behind the main one that you forgot to remove :) Also, the pie chart looks more like a lilly pad than a pie chart. I realize those were a lot of criticisms that I just gave you, but I really do like the direction of this one - especially the pie chart that is a tiny bit abstract. I think that has promise, but I'd say drop the "F" concept, and try to make it look less like a lilly pad if you can.