DotNetNuke OpenForce Connections
If you are close, don't forget to go to the OpenForce US Connections event that will be co-located with the DevConnections conferences. Aside from enjoying a Las Vegas trip, you will have access to some interesting sessions related to module development, skinning and the administration side for DotNetNuke.
If you are not familiar with DotNeNuke, make sure you stop by one of the available booths where you will be able to ask questions and see why it is the number one open source web application platform for asp.net.