Business Week Online has a primer on why Web 2.0 has "Corporate America Spinning."

Nonetheless, the notions behind Web 2.0 clearly hold great potential for businesses -- and peril for those that ignore them. Potentially, these Web 2.0 services could help solve some vexing problems for corporations that current software and online services have yet to tackle.

For one, companies are struggling to overcome problems with current online communications, whether it's e-mail spam or the costs of maintaining company intranets that few employees use. So they're now starting to experiment with a growing array of collaborative services, such as wikis. Says Ross Mayfield, CEO of the corporate wiki firm Socialtext: "Now, most everybody I talk to knows what Wikipedia is ...