I don't know if these pressure sensors have been discussed. They are the Freescale series of pressure sensors (MPXHZ6130A as an example). They have three wires, +5 V, Ground, and signal. The signal is 0-4.8 VDC. This makes them a PERFECT sensor for the Fusion Brain. The one I am going to use is an absolute pressure 2.5 bar model. They are very accurate. It has a barbed fitting so it is easy to plumb. It will tolerate temperatures up to 125 Degrees C so it can sit under the hood (or cowling in my case). They have a bunch of models with various ranges. They have Psig and differential pressure types too. The best part is they are pretty cheap, around $12.
http://www.freescale.com