Ed Cone provides some guidelines for journalists who also blog. They're useful ideas for anyone who are considering combining weblogs and work in positive ways:

Try not to be a jerk If you publicly trash your job, your publisher, your co-workers, your last article, and so on, don't complain when you get fired or shut down for doing it. Work with the boss if you can If your publisher thinks your weblog is too close to what you do on your day job, try to get the publisher to adopt the weblog. Make it a win-win. If CNN had co-branded the Iraq weblog maintained by reporter Kevin Sites instead of shutting it down, it would have been great for CNN, Sites, and %u2013 oh yeah, them %u2013 people trying to learn about the war.

...via Scripting News