A Green Car Congress article has an overview of various new cells from A123Systems
http://www.greencarcongress.com/2009/05/a123-prismatic-20090519.html
...a 20Ah energy cell for plug-in hybrid and electric vehicles, with a targeted start of production (SOP) of 2009/2010; and 4Ah, 6Ah and 8Ah power cells for hybrids, with vehicle SOP of 2011/2012.... second-generation of the .. 32113 cell entering high-volume production with a major European OEM later this year. The Gen-1 cell has a capacity of 3.8 Ah. A coming Gen-2 cell, which uses a higher power and lower-cost electrode design, will offer 4.4-4.6 Ah of capacity, and is targeted for mass production start in 2010.
... The new prismatic cells offer an significant improvement in cost per kW as well almost doubling the power density compared to the Gen-2 32113 cell.
Funny thing is I can't find any of these documented on their website: http://www.a123systems.com/
