This link discusses the possibility of using LiS in automotive uses:
http://mysite.wanadoo-members.co.uk/ecotech/lis3.htm
Both Polyplus and Sion have hit the high energy targets, but have since been struggling to cope with safety (such as nail-pierce test) and longevity (cycle life) issues.
If they managed to achieve the safety / cycle life of A123 or Valence etc that would put an end to this "gasoline" stuff.
There is a nice interview with some SION people here:
http://www.evworld.com/evworld_audio/edta04_sionbat.mp3