An anonymous reader writes: The Automotive XPRIZE announced yesterday the first 31 teams to have signed on for the competition to build 100 mpge (mile-per-gallon equivalent) automobiles. The list contains obvious contenders like electric bike vendor ZAP, electric truck peddler Phoenix Motorcars, Munich's überefficient Loremmo AG, and Elon Musk-backed Tesla Motors as well as Cornell University and a laundry list of other less well known names. There's even a team commited to an Open Source-like license. Notable is the total absence of any established manufacturer. Contrary to expectations of a Big Auto win, could the AXP be up for grabs?