The blogosphere is in love with the idea of an open source world on the web. Sharing vast stores of what might ordinarily be considered private information is the rule, rather than the exception. If you can offer content that's usually private - trade secrets, pricing, contract issues, and even the occassional harmless rumor, your blog can benefit. Make a decision about what's off-limits and how far you can go and then push right up to that limit in order to see the best possible effects. Your community will reward you with links and traffic.