Article in 4/7/08 edition of Forbes "GM may yet beat Toyota in plug-in cars, but its breakneck development pace is fraught with risk".

Provides appreciation for the stakes. Article includes table of battery developers, their chemistries, target vehicles, and expected vehicle delivery dates.

http://www.forbes.com/opinions/forbes/2008/0407/068.html

That is a great chart, showing who's producing what for whom.