Why let that extra space in your driveway stay empty, when you could rent it out? An online listing service, ParkatmyHouse.com, could help match you up with folks who’d like to spend time in your area but can’t find parking. On the flip side, maybe you want to drive to Yankee Stadium or another attraction and would prefer to park at a cheaper rate, and with less hassle than weaving out of a stadium parking lot. British based ParkatmyHouse will be entering the Tri-State area, Boston, Washington D.C. and Philadelphia, helping anyone with a parking space match up with someone looking for a parking space. The service includes not just homes, but also businesses, religious institutions and schools. The site takes a 15 percent cut from each transaction.