Google blogger extraordinaire Matt Cutts outlined some guidelines for company blogging 101.
1. The easiest time to make a blogging gaffe is when you’re starting out.
2. Don’t criticize other companies or people.
3. Don’t post when you’re angry.
4. Learn which stories matter and which ones don’t.
5. If you make a mistake, don’t clam up.
6. Include a datestamp on all your posts.
Excellent advice from a seasoned corporate blogger.