[Batfish]

I haven't seen the RCDriver article yet - however:
I had an opportunity to use one of those packs a couple months ago in my Associated B4 buggy for local club racing.
It was a 2s2p 1100mah A123 battery pack the same length and width of a normal 6-cell nimh stick pack, and just a little bit shorter. That means it'll fit just about any place you can fit a 6-cell nimh stick pack.
It worked great for the 4 weeks or so that I used it, which included about 20 cycles.

A123 was not ready to release them mainly because their Hypersonic Charger beats the heck out of them when fast charging at 8-10Amps, which shortens battery life. They definitely didn't want to release a battery that would have shortened life from using their own charger. If they are showing the pack in a magazine, maybe they have a solution to the charging issue. I certainly hope so - I really want to use the pack in my race vehicles :)