I'm working on a very similar project. I'm an interaction designer so I'm developing it from an usability and interface point of view.
For my thesis though, I would like to make a very simple prototype. I altready connected arduino to flash to try the interface, now I just need a sensor to get the istant w consumptions a simple circuit (let's say with 3 60w light bulbs) for demo and presentation purposes.

I dont need the wireless stuff, what I need is just an energy consumption meter that possibily works without the need to cut the high current wires (same principle of this device http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=270516520081&ssPageName=STRK:MEWAX:IT#ht_653wt_939) that sends the data directly into analog input.

I will give you credit for you collaboration and also I'm willing to pay a reasonable price if you are able to help me (I'm a student). So tell me if, how much and when. Do not spread my email.

P.S.
If our collaboration works maybe there's more to do...