I am not sure about the max charge rate, but you can use any charger that is designed for rechargables.
I use a cell pro multi 4 for my lipos, It automatically senses what kind and size of battery I plug in and charges at the factory settings. I'll check what its charging at when I plug in the eneloop's.

As far as being 2000's, My radio (M8) since putting in the eneloops has lasted 5 months, I have used in the last half of the indoor season and 2 big races (2 day events) and it runs 3 cars. Im close to 180 minutes on the run timer- It is not even close to time to charge yet. I wait until it goes to 1 bar left on the fuel gauge. I bet I get 8 months on 1 charge... 999 to go.
I like the fact that you can charge these up and a year later (I don't know why anyone would wait a year to race.) but they will still hold 85% of the charge while any other re-chargable will be dead.