Where can you find a universe of voters going 73-12 Obama over McCain? On Facebook.
And you can be a key part of getting out that vote. The theory is simple: Status messages are among the most visible things on Facebook. Updating your status is immediately seen by all of your friends.
By donating your status to get out the vote for Barack Obama, you agree to have it set in a coordinated fashion on Election day with thousands or millions of other Facebook users (127,000 right now, and growing exponentially through viral channels), spreading that GOTV message throughout all 100 million users of Facebook.
As with all viral growth, early differences in growth make huge difference. If you have a facebook account, take 5 minutes to join in, donate your status. It doesn't substitute for making calls or knocking on doors, but its easy and could make a big difference.