Thank you, how can I get the difficulties number or from where ?!
I mined with 500-600 megahashes for a month about a month ago and got .3 of a coin so with increased difficulty and what not, I would say a long time? I was using Slush's pool, I gave up. I'm presuming you have a Block Erupter?
Yes, you are right, I want to buy and start with Block Erupter, any suggestions ?!