I've been signed up to the web 2.0 wiki for about a year now, ever since I started working on a podcast for the law library as a trainee. I've just added an entry about my experiences of Prezi.com if anyone's interested - it's software for creating online guides, and it was one of the things mentioned in one of the sessions at the Staff Conference.
I like wikis - again, they're quick and easy to set up and use, and are a simple way of keeping everyone in a group informed about new developments on a project.
