Classroom 2.0 LIVE Workshop Ideas AND Questions

We've batted this idea around a few times, but now we have some real news:

* Ning has said that we can hold a Classroom 2.0 LIVE workshop at their offices in Palo Alto (would be a really fun connection)
* Wikispaces has said that they would also help sponsor
* Feels like the acceptance of Web 2.0 for classroom / professional development is growing fast
* Our "unconference" for edubloggers in Atlanta was a huge success, and the idea of participants teaching each other now has a good model

I'm thinking about one-day workshops, held in different geographical areas, with some formal sessions on the use of Web 2.0 tools, some informal teach-each-other sessions, and some group discussions on broader issues relating to implementing technology in the classroom.

I have a few questions where feedback would be really helpful:

1. I think we can get enough sponsorship to have Classroom 2.0 LIVE workshops be free. Do we need to charge anything to make sure people who sign up attend? If we charged some amount, we might also be able to provide some food, etc.--would that be important?

2. Is there enough interest for us to hold them in different areas in the country and get attendance? For instance, if we hold one at Ning in Palo Alto / SF Bay Area, how many would be interested in attending?

3. Would you want to invite others who are not in CR 2.0 to come? What could we offer at the workshops that would promote bringing new users?

4. What instruction/activities would you want to have at the workshops?

5. What day of the week would be best to hold a workshop? During the week or on a Saturday?

6. For the Palo Alto / Bay Area workshop, is early September too soon to hold it? Would October be better?

Thanks!