The cloud is the future, we’ve all heard it said. Ballmer’s all in, Jobs said it’s all in the cloud, and Schmidt made it the centerpiece of Google’s strategy in 2010. But we’ve also seen the danger of cloud outages, thanks to Amazon. So, in true rebel form, in spite the dazzling prospects of the cloud, Nimble Storage is quietly offering an alternative – and investors are buying in. Today, Nimble Storage, the developer of converged storage and backup solutions, announced that it has closed a $25 million series D round, adding to the $16 million series C it closed in November of last year.