Here's a little more useful bedtime reading from the CandlePowerForums:
Why Eneloops?
A look at slow charging
There's lots of info there about the best way to charge NiMh cells. It seams you either need to charge slowly at about 0.1C for a fixed period or at 1C to 2C with -dV/dt charge termination. It appears that detection of full charge can be problematic with currents below 1C.
FYI: 'C' is a current equal to the capacity of the cell divided by 'hours'. So for 2000mAh Eneloop AAs, 1C is 2000mA (or two amps), 0.1C is 200mA etc.