I think sorting on a time period would be helpful. Not sure about the Kudos thing - are you talking about the people who click THANKS here in the forum and intergrating that into the marketplace also? If a developer isn't posting in the forums, or people don't thank them, that may be a negative mark against them for no reason too...
It's tricky to setup a list like what you're doing, and what you have in place is great - I'm glad you get to figure all the bugs out and I just get to evaluate and say Yay or Nay
