No offence taken. Most people think it will be useless. But you are very, very incorrect when you say I'm not going to get good data. I've already got tens of millions of measurements of excellent data. Check out http://pressurenet.cumulonimbus.ca and play around with your local area. Live data goes back about a week, but there's an archive that covers most of 2012. Check out New York City, in late October / early November: Hurricane Sandy.

I'm livestreaming the data to Cliff Mass, a professor of atmospheric science at the University of Washington. He's got a small team analyzing it to calibrate the sensors and as we grow the network, he'll be using the data to improve weather models and try out new systems of forecasting.