FYI - There is an interesting response here discussing the Milwaukee V28 power tool batteries
Re: TF owners
His discussion makes them sound like an interesting alternative to the DeWalt (A123) packs. For example the built in BMS doesn't get in the way of using them -- unlike the DeWalt pack having a 15A limit in the BMS. Also availability of connectors is simply a matter of ordering them from DeWalt.
I did a bit of reading as a start -- their V28 pack is the only Li-ION one they sell. They also have 18V and lesser voltages but those are Ni-CAD(??). It's a little hard to tell because their pages don't just come right out and say what battery chemistry is in use. Their target market is obviously construction workers and those guys probably don't care about chemistry.
http://www.v28power.com/ - is their web site