We have been looking for an alternative to SourceForge as a place to host SplendidCRM.  Our wait has seemed to pay off as Microsoft has just announced CodePlex.  http://www.codeplex.com

"CodePlex is an online software development environment for open and shared source .NET developers to create, host and manage projects throughout the project lifecycle. It has been written from the ground up in C# using .NET 2.0 technology and Visual Studio Team System on the back end. CodePlex is open to the public free of charge."