Blog Example: Veer's Got A Good Idea
If you like me think that the typical blog - the microsite using Blogger or Typepad templates - is both boring and from many business perspectives ineffective, you should look at Veer: Ideas.
This design company doesn't make a big fuss about the fact that they run a blog. It is in a seamless way made a part of their corporate site, and they use it as the major input into one of three top levels of their structure. Nice information architecture, nice way of using the blog to support, rather than complement, regular business communication.