I have created a CodePlex project for ExcelDna, available at http://www.codeplex.com/exceldna.
I consider the move experimental, but I hope that a public website and mainstream hosting of the project might increase the visibility a bit. I will continue to monitor and post new releases to the Google Group http://groups.google.com/group/exceldna as well.
I have imported the source code history since the first public release in May 2006. The latest release remains version 0.18.
Also worth checking out is the great work on the ExcelDna Contributions project at http://www.codeplex.com/exceldnacontrib.
