No, I meant about my battery theory, not your docking one, sorry! Although that would be cool too.
The battery thing is newer than most MWSF 09 rumors. However I really hope that isn't it. It just doesn't fulfill the big bang theory of going out with a blast.
As for the batteries, they should be made by a company called Z-Power. They are promising 40% more life with 95% of the materials being recyclable.
Link
I think this video is telling. The CEO of zPower was talking about his companies batteries at CES 2008. They had a contract to build them for a "yet-to-be-named" laptop manufacture. IMHO Yet to be named should might as well be Apple. He also said that it would have been coming out in the summer of 08. Well the 17" MBP was delayed...