A while back I got the community to help log drop rates, and we got some good results. Lately, I've been using xKiv's Greasemonkey Script to log my hacking and it's been giving great results from the data collected (see recent edits…). I'm at about 6000 rounds logged in the last month or two.
But (marketing voice) — we can collect data so much faster if everyone logs it!! Anyone willing to install this script in Firefox/Greasemonkey and send me the logs would be greatly appreciated.
Teaser summarized data here: http://pastebin.com/7LhGXZdM — for any action that I've logged at least 6 datapoints.