Penton is a large user of DNN.  In fact DevConnections, our OpenForce Conference partner, is a Penton subsidiary.  DotNetNuke Corp and R2i are currently working with Penton to migrate their existing WindowsITPro site to DNN and will be discussing some of our lessons lerned in a Panel discussion at OpenForce North America.  I don't find it odd that a Sharepoint community site run by a large corporation would be using DNN.  The thing to remember is that many organizations consolidate on just one or two platforms.  What would seem odd is if a company felt compelled to use a dozen different platforms just because they published technology magazines targeting many different platforms.

Sam,

My presentation material is rather simple -- other than some sample sites (now including the Penton sites) and the brief description of DNN, the presentation is all about performing an install -- depending on the audience this can be 5 to 50+ minutes in length.  The presentation helps counter many of the newie issues about a failed install seen in the forums.

Paul.