Really like Princeton Public Library's BookLoversWiki. I liked the format and could go directly the category I wanted. I even found a few titles to add to my reading list. Would be nice to have SAPL have a Wiki like this.
The ALA New Orleans 2006 Wiki is very well done. Some great photos are included. It's great having all the information you need for the conference right there- the schedule, transportation information, even a section for first time attendees.
I think the subject guides/LibGuides work very well with a Wiki .