Here's some great advice from Sun's blogging policy for those of us who blog about their company.
Think About Consequences
The worst thing that can happen is that a Sun sales pro is in a meeting with a hot prospect, and someone on the customer's side pulls out a print-out of your blog and says "This person at Sun says that product sucks." In general, "XXX sucks" is not only risky but unsubtle. Saying "Netbeans needs to have an easier learning curve for the first-time user" is fine; saying "Visual Development Environments for Java sucks" is just amateurish. Once again, it's
all about judgment: using your weblog to trash or embarrass the company, our
customers, or your co-workers, is not only dangerous but stupid.