If you want to capture the cloud sweet spot look to invest in Software as a Service companies as this segment of cloud computing is the most mature, according to our Tech Radar research (look for an update to this analysis in the fall) and thus seeing the strongest enterprise adoption.
While you would think that many months of planning are occurring at the CIO level around the use of cloud computing, most cloud computing adoption is beginning at the project level, and many of these projects are flying under the radar of traditional IT governance.