Chrome user? Want to help out an intrepid young researcher?
What I'm recording is tab and window usage over time, along with the urls visited and a snapshot of the text on the page (more specifically, the term frequencies of the text) in order to be able to do higher-resolution comparisons (such as cosine similarity) between documents in and across browsing sessions. All this data is anonymized before it's even sent to me, so I don't have any direct way (nor, frankly, any desire :) to figure out who you are.
Link to more info, download instructions, and actual download: http://keegansawesomecs303project.posterous.com/the-chrome-extension-honeypot
tl;dr - I did a Chrome Extension for a project for a CS class, and I'm running a bit behind, so I need help from the Hackernews crowd to bail me out and get me lots of data-- I know a website that could help with that ;).