Getting Started

I am attempting to use more technology in the classroom by incorporating blogs and wikis into my curriculum. I teach high school social studies and have found many resources on the internet to aid in teaching U.S. History and Civics. I would love to create a wiki for my classes and have the students use these, but I haven't been trained in using them and I am still somewhat uncomfortable with how to use them. Are there any suggestions on what other teachers have done and how it worked? I would be interested to know how to make this successful.