Folding@Home - it's a project out of Stanford university for people to use their home PC to try to help understand how different proteins fold. This research may help find a cure for various kinds of cancer, Alzheimer's, Parkinson's, etc.
I set up a team for people from The W to contribute to. The link at the top of the page goes to the stats page that I set up for us to track our progress.
It might be misreading your "null" as a negative number - epoch time is measured as the number of seconds from 1.1.1970 IIRC, and a lot of time values are stored in the database in epoch time values. I'd check the code but I'M ON VACATION!