Some of the 50 Most Innovative Companies we cited in March have found one another as intriguing as we did. We named Pure Digital Technologies , maker of the supersimple Flip digital video recorders, No. 7; that month, Cisco Systems  (No. 5) bought the company for $590 million in stock. And in April, Disney  (No. 22) inked a deal to stream ABC shows such as Desperate Housewives and Lost on Hulu  (No. 3).