I'd be more inclined to pay for MixRank for my contextual ad research if another column with a unique ranking system was created whereby the resulting sites in the Traffic Sources are arranged from Best to Worst using the values from the "Uniques", "Days Seen" and "Avg Position" columns.

e.g. a search for mint.com brings up:
Site Uniques Last Seen Days Seen Avg Position
betterbudgeting.com 62615 2011-07-20 30 5.9
gatherlittlebylittle.com 10367 2011-07-20 30 4.4
exmoney.net - 2011-07-20 30 3.9

As a PPV/CPV advertiser, i'm VERY delighted to have these 3 urls come up so easily in the results for me, however, I'd have to watch out for exmoney.net which has no uniques but has great "days seen" and "avg position" figures, therefore it most likely would be a waste of time (and possibly expensive for me) to advertise on the exmoney.net url and other urls with the same combo of results like it.

Hence, if another column showing bars (like the Competition Level Bar in google adwords keyword tool), that indicated that the url had the best mix of uniques/days seen/avg position, it WOULD BE FANTASTIC visually!

For example, the better mix, like betterbudgeting.com, the first url up there, the "fuller" the bar would be colored so in betterbudgeting's case, maybe its bar would be 3/4 full for example...