Thanks guys, nicely written and quickly too.

Can several cgminers be pointed at the same username/bitcoin address?

Or should one use a separate address for each rig?

If you have several rigs, are you supposed to able to use the same bitcoin address for all of them when mining on middlecoin.com, or do you have to create a new bitcoin address for each cgminer instance you connect?

Would post here:  https://bitcointalk.org/index.php?topic=259649.6020
but I am a newbie