There are so many ways to implement Responsive Web Design with Drupal. At Amazee Labs we use the Omega Theme for all our Responsive Web Design needs.

We would love to share our experiences with other developers who build responsive sites.
The following are topics we plan to discuss:

- Experiences with RWD and which BaseTheme everybody uses
- How to make RWD working with Panels, Contexts, Delta, DisplaySuite, etc.
- Responsive Images
- Navigations in RWD
- Best Practices for Debugging / Testing on Devices
- How to use the Grid, calculate your own Grid.

The Idea is to have developers in which have knowledge about implementing Responsive Web Design.

If you are not experienced with RWD and want to know more about it, check the Overview about the RWD Things happening at Drupalcon: http://groups.drupal.org/node/218269