Wow- that is a great thread!

I'm recently involving myself with some rather in-depth maintenance of NiMH batteries (primarily for my growing fleet of roombas, but also other cordless devices) and have been doing a lot of reading.
Some good sources:
Batteries In A Portable World
http://www.buchmann.ca/
and
Battery University
http://www.batteryuniversity.com/

Meanwhile, I'm seriously considering purchasing this Computerized Battery Analyzer.

Anyone into battery service that would care to comment?