Seeking Expertise

So, this past week I was involved in a committee meeting. This committee's job is to create faculty development opportunities at the small liberal arts college where I teach. We are in the process now of planning next August's "welcome back" faculty-development day. Ordinarily we bring in an outside speaker who dedicates at least half a day to a workshop on a relevant topic. So, the question came up, "What should the topic be next August?" After listening to a couple of tired ideas, I asked my colleagues if anyone besides me was concerned about the educational implications of Web 2.0. One other person shared my concern and interest. A couple of others asked me to explain what I meant. Long story short ... there is some momentum and interest to bring in a speaker on this topic. Our hope is for a speaker who can do two very different things: inspire a vision for what might be, and bring some practical steps that faculty may take to begin to bring this vision to be in their own teaching. As I said, this is a small liberal arts college. I can give more detail if needed, but what I'm looking for here are some recommendations. Who should we bring in? If you suggest a name, tell me also why you are suggesting them. This is for real; we are looking for a speaker for a day next August, and the committee is going to bring some names to the administration.