Using New Technologies in the Social Studies Classroom

I am going to develop one well researched, useful, and engaging way to use new web technologies in my classroom this semester. My school has recently purchased a wireless cart for laptops in the classrooms. I am the social studies teacher at an on-grounds school at a residential treatment facility. A large percentage of my students are labeled as special needs. I see opportunities for them to get engaged in their own learning that I had never considered before beginning research in new web technologies.

I need ideas to get started. Please send any information on uses of blogging, social networking, wikis, twitter, etc. in social studies classrooms.