Yesterday I released the latest update to the personal area networking library to the 32feet.NET site. This release focussed on bug fixes and improved compatibility and error handling. This release supports device discovery on the latest WM5.0 AKU3 devices and beyond where the registry layout has undergone a few undocumented changes. You can view the full list of closed work items for this release on the CodePlex workspace.
The code also now has unit testing (not yet covering all functionality) and a new sample application for using IrDA on desktop Windows versions.