I just picked up a Sony BC-CS2a charger, it has two bays for either AA or AAA size NiMH cells, has smart termination, and independent channels!
Here are the
sony pages on it.
But of course if you buy it from sony it'll run you $65, from ebay however they are
$10.5 shipped.
I have a pair of energizer rechargeable on it and the charger auto terminated when charge complete. And because it's independent channel it can charge 1 cell at a time.