Now for some depressing reading.
Jan 5 -Jan 12 0.1 bt
Jan 12 - Jan 22 0.1 bt
Jan 22 - 3 Feb 0.1 bt
Feb 3 - Feb 18 0.1 bt
Feb 18 - 9 Mar 0.1 bt
Mar 9 - 4 Apr 0.1 bt
Apr 4 - May 11 0.1 bt
Single cube over clocked, running 24/7 at 38793 GHs.
So, will it ever generate 2 whole bitcoins?
Probably not but more importantly calculate the power cost. Some days I am underwater and other days it's making money all depending on the "luck". But it probably will not be long until on average it is loosing money, that it is cheaper to but BTC than mine it with a Cube. My break even is about 24 Hour Earnings of 0.0017 BTC at $470/BTC everything considered, direct electricity and cost of AC.
1 Cube, 300w, 35 GH/s, profit: $0.39/day
3 Gridseeds, 24w, 950 kH/s, profit: $1.44/day
Just to provide some perspective Cubes are going for $105 on ebay, I have seen then as low as $75 (both including shipping).