Has anybody used an OBDII-to-Bluetooth device like this one:
ScanTool.net LLC - OBDLink Bluetooth OBD Interface Scan Tool - ScanTool.net
I came up with the bright idea that you could make a OBDII-to-Bluetooth device and then have customizable screens to watch whatever you want and log it as well on a smart phone or laptop. Like most bright ideas, it's basically already been done. I found that one above.
Anybody used this one or one like it?