I think it's inevitable, cost effective, and has only the forces of the Old IT Oligarchy to evade. Look at Best Buy - how can you say no to transforming the power of your company into 130,000 person hive of innovation, retain your employees (from 130% turnover to 50%) and other cost savings. Enterprise 2.0 will win because it makes huge dent in the current cost of $28,000 a year per employee (see IDC stat in KM World) at price points of like $100 a seat. The problem is not the new social software - the problem is the old enterprise search, etc. etc. which doesn't work. Compare how easy you find stuff on Google versus finding the person who knows (and posts) the stuff you want. Precision wins. And E2 is cost-saving. You just have to jettison some of the old junk. or take a hard look at what it's buying.
And, in a related point, how many companies think SharePoint is 2.0? And deploy the technology but never the adoption part? This is just wasted money.
The problem is the laissez-faire old style hierarchical IT and content management - that has to go.
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