Thanks all ! Yeah I've some experience in cryptocurrencies. Actually I had two altcoin servers @home, I'm an active member for bitcoin / litecoin in France on several internet forums. I was an early adopter of Litecoin and I hope it will grow up so I can buy a new house with coins I kept
About Bitcoins I was (3 years ago) on Slush's pool. It was not on stratum yet of course. 3 years ago I made around 0.06BTC per day with only my CPU ! I sold my last 25 ones for something around 9€, just before the great increase :/
I was one of the first ASIC buyer at BTFPGA but as you probably know they never delivered... so I ordered a Little Single at BFL and I'm still waiting it. I think I'll never be able to have a good ROI on it with this huge diff increase. I bet we'll see a diff at more than 1 billion before the end of the year on bitcoin. I was thinking to buy a 100Gh/s ASIC delivered in october but after several different calculation I think it's only a loss of money.
For other altcoins, I mined DGC, YAC, MEC etc... but the best were Worldcoins and Feathercoins (very good value). I had just 4 graphic cards (6970 and 5970) for around 2Mh/s on scrypt. I stopped mining cryptocurrencies just before summer as the temps were too high in my home and I started to encounter crashes.
Thanks for your warm welcome