What grade do you teach? I work with students in grades 9 thru 12, across all subject areas as a research and technology specialist. One of the best parts of being a high school librarian! We are an all IB public school.
My PBwiki screenshots:
What was your first experience setting up a wiki for your classroom, what did you learn? My first experience was setting up the IA World Music wiki page. We didn't know how the kids would use it and it was really an experiment. We had a backup plan just in case. Turns out that the project was more successful than we could have imagined! The students took it to a whole other level. They started embedding audio and video files, which really impressed us since that was not part of the original expectation. The students were also happy about working on a new kind of project. They are ready for integrating technology :)
What lessons worked well with the wiki, which didn't? I don't think that using a wiki as a discussion board or a blog works very well. Some teachers have wanted to do that. It is good for projects/interactive reports. I think that my WWII Homefront Wiki and my IA Space Wiki have worked really well.
Did you have a difficult time introducing PBwiki in your school? If so, how did you convince your principal? Not really. I went to Ramit's session when he was in Detroit (Michigan Association of Computer Users in Learning) for the MACUL conference. After that day, I requested a PBwiki presenter pack and set up a Professional Development day with my staff. My principal is always open to me bringing in new ideas. Before the PD, I found a teacher to work with so that we could show a successful wiki and how it could be integrated into any classroom. As you can see by our schools "wiki gateway" teachers have been using it a lot.
I use this video a lot when leading professional development sessions. I think it's a great anticipatory set. Even teachers need to get excited about what they will be learning.
How did your students adapt to using a wiki in the classroom? They love it! I think they are pretty happy not to be doing paper posters and boring reports. It's much more visual with a wiki and you can embed a lot of different elements. They love using Bubbleshare and slide.com to do stuff with pictures. I think it gives them good experience with creating meaningful Web 2.0 experiences.
What should first time wiki users be aware of? That there are a lot of options and not to get overwhelmed. I would start simple and experiment after my first success ;)