Oh, I knew you'd ask that. Ummm, here we go:

http://www.acehobby.com/ace/ACE2521.htm

Ace Super Digipulse Multi-Charger

Btw, since the charger works on a timer and has auto-trickle, I'll sometimes cheat a bit. For example, if I have a 1000mah pack that I know is about half-full, rather than charging at 100mah, I might put in 60mah, which will top off the back, and while the trickle that kicks in is a hair low, it's enough to do the job and it avoids over-charging the pack.

Oh, I forgot, one downside of this charger is that it uses some non-standard charge lead plugs. However, you can get the correct size plugs at radio shack and with a little soldering you are all set. I made up 6 RX leads by getting some long aileron extensions and doing a bit of soldering. You can also buy leads.