Raspberry Pi’s $35 Linux-based computer is a runaway success. Creator Eben Upton told ZDNet in a recent interview that his team thought they would sell 1,000 units when they were designing the mini PC, but sales have now topped 700,000. “We honestly did think we would sell about 1,000, maybe 10,000 in our wildest dreams,” Upton said. “We thought we would make a small number and give them out to people who might want to come and read computer science at Cambridge.” On a slightly disappointing note to those hoping for an upgraded model in 2013, Upton said in the interview that the company has no plans to launch a sequel to the latest Raspberry Pi “Model B” this year.