Attention Company published research on the attitudes of people who participate in online communities - I heard about it from Read/WriteWeb.  Also got some idea of the type of information you can share on line - based on the opinions of the "Out There" population.

According to Read/WriteWeb:

"..The main findings of the report were that people who are “Out There” are more likely to:

• Value fame as an “asset”
• Willing to share certain types of sensitive information on the web
• Believe it is appropriate to criticize their organizations on the web
• Believe that “organizations need to be more transparent to succeed”
• Believe “there’s no harm in openly discussing the work I do inside my organization with others”

The report concludes that "Out There" people are potential saviors of companies, because they are the people who are going to help companies succeed. "Out There" people are characterized as:

• Fast followers
• More flexible
• Open communicators
• Aspire to greatness
• Looking for new, innovative ideas
• In short – your future leaders

 Pretty interesting paper.