Hello Procharged,
We are currently offering the 3 battery configurations available on our website,
www.a123racing.com. We will be looking into new configurations in the furture but for the time being hope that people will buy the packs nesessary to create their larger packs (For example, if you need a 3S2P you can purchase two of the 3S1P packs and string them together in parrallell).
If you check out the forum link that Batfish posted above you will find answers to alot of questions.
Please let me know if you have any other questions.
Power . Saftey . Life
Brian