I'm happy to say that we've been blogging at my work for the last 3-4 months and it has been well-received. We're using SharePoint as a blogging tool -- not really the normal tool for blogging, but it actually works pretty well. People can subscribe to alerts to a discussion, and you can also sort your discussion by specific categories.
I find that if it makes a nice substitute for email. When you have something to share, but don't want to send an e-mail blast, the blog is perfect. It doesn't clog inboxes, and people can respond at their leisure.
By the way, you should check out the September Intercom article on corporate blogging -- it's a good read.
About Tom Johnson
I'm a technical writer / API doc specialist based in the Seattle area. In this blog, I write about topics related to technical writing and communication — such as software documentation, API documentation, visual communication, information architecture, writing techniques, plain language, tech comm careers, and more. Check out my API documentation if you're looking for more info about that. If you're a technical writer and want to keep on top of the latest trends in the field, be sure to subscribe to email updates. You can also learn more about me or contact me. Finally, note that the opinions I express on my blog are my own points of view, not that of my employer.