Two of the strongly emerging sectors of northern Nevada's economy data centers and Internet fulfillment centers each took another step forward last week. Rubicon Data Centers plans to build a 20-megawatt data center housed in a 300,000-square-foot facility to be constructed at Tahoe Reno Industrial Center. The project is part of a larger master-planned campus on 44 acres to be developed by Prologis for Rubicon.Meanwhile, BizChair, an Internet retailer of office furniture, said it's opening a distribution center in a 292.500-square-foot building in Stead, primarily to serve West Coast customers.Rubicon says building a data center in northern Nevada makes sense …