I'm guessing the GPUCoin price will be pretty close to what it costs to mine. If you have to pay more than the graphics card's price you want to buy - in electricity costs - it doesn't make much sense to mine, right?
So can we have an estimate how many GPUcoins you can mine with 400usd of electricity in a couple of weeks? I think that would give an estimate of the max value of the coin.
I think this is logical... and will prove true once the business plan executes. Thus it will be dependent on hashrates..