We at Engage spent the end of last week in Tulsa, presenting and participating in the 3rd annual Tulsa TechFest . My colleague Ian has written up a great review, with links to all of our presentations on his blog . I presented on Building a DotNetNuke...
It shouldn't be hard to get started writing a module for DotNetNuke , but it doesn't seem like there's a whole lot of help especially when you are wanting to use C#. At Engage , we have created a Visual Studio project template which will get you started...