San Mateo's Wikia Inc., a spin-off of the popular Web site Wikipedia, has been busy this year. The two-year-old startup, which hosts Web site communities created by its users, moved from Florida to Silicon Valley, appointed former eBay Inc. executive Gil Penchina as its CEO, snagged two rounds of financing from prominent investors, and acquired online sports community ArmchairGM over the past 12 ...

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