Blogs and Wikis for corporate learning?

I have recently had a number of conversations with some different corporates about their interest in using Blogs or Wikis within their corporate learning programmes. Most of the individuals in these conversations are actively blogging themselves, but it made me wonder how many companies were actively using them already. Or are these just an interesting idea, or not even that.

Maybe you could let me know your view by responding to the web poll on the right of the page. Thanks in advance and PS the answers so far will be displayed once you've voted.

David