This may be news to you, it was to me. My brother just sent me a link about craigslist winning an auction to transmit data into deep space.
Beam your craigslist ad into space
WHAT: craigslist CEO Jim Buckmaster won an eBay auction for the first private communication transmission light years into deep space, with the idea of offering this opportunity to craigslist users.
HOW: The friendly folks at Deep Space Communications Network (DSCN) will beam the postings trillions of miles into space using redundant klystron transmitters and a satellite dish.
HOW MUCH: The winning bid was $1225, but craigslist is negotiating with DSCN for extra capacity to accomodate the anticipated volume of craigslist postings to be transmitted - 10,000 ads were designated by users for transmission during the first 24 hours!
WHEN: The transmission is currently scheduled for May 15th, 2005, directly following the launch of the space shuttle Discovery.
WHERE: Cape Canaveral, FL
WHY: It seemed fitting for craigslist users to be the first to beam internet postings and classified ads into deep space.
They say there's more info here.