Thanks, I didn't even look at units for cars because they are generally big dollars. They get up into $4K or more to do multiple channels.
I already have one of these on the way:http://www.mccdaq.com/usb-data-acquisition/USB-5106.aspx
It only logs four channels, but can export the data and I can process it in an excel sheet.
It looks like the AEM is actually a better choice. Unless something else turns up, I think I'll also get one of the AEM units. I can use both units for something.