Mining is the base of bitcoin industry.
And based on the calculation, mining is still worth investment.
Prove it with your numbers right here.
Let us see your profit buying an Avalon 28nm unit shipped to Australia with electricity costs over .29 cents a KwH in 2011.
http://shrinkthatfootprint.com/average-electricity-prices-kwhI don't think you can show that at all. Even with the lowest cost of electricity small home mining is now dead with the price of BTC at this time. And farms are likely going to shut down as they stop being profitable. Unless you are spending millions on this I suggest you don't start especially with Avalon given their past failures.