A few weeks ago, Jeff turned me on to the Tire Traker wireless pressure monitoring system after I had a flat the resulted in a ruined tire (see Flat Tire thread). I bought one for our 19 and used it on our trip to Yosemite, 10+ hours on the road. It was easy to set up and use, lots of on-the-road ease of mind. Here's a link: http://www.tiretraker.com/default.asp