What is the difference between a blog and a wiki? Which is better suited for what?
A blog seems to me best suited to a running but somewhat ephemeral dialog. Yes, you can view older postings, but blogs seem best at highlighting whatever was recently posted. Older postings drop from ready view (although I have sometimes found needed info by searching a blog). It is good for announcements and information sharing. We have an internal blog at our library, and it's a great communication tool -- it gets a lot of information that needs to be shared widely out of individual e-mail boxes. And because everyone at all levels of staff can view the blog, no one accidently is left out of a communication because someone forgot to include them on an email.
A wiki seems to lend itself to a more organized way of presenting large amounts of information you would want to have ready access to, and use, later. We have started using wikis to develop research guides at our library. A blessing and a curse is the collaborative aspect. It's easy for more than one person to contribute to a wiki, but that can also cause trouble. For example, one minute after I posted my own contribution to the Web 2.0 course wiki, someone else went in and deleted it!
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