Good news from the MSBuild team. Work on support for targetting .NET 1.1 has started under the project codename MSBee - MSBuild Everett Environment (Everett is the codename for Visual Studio 2003). I'd like to move to MSBuild for building XML-RPC.NET and this could be very useful. Craig Lichtenstein has more details. I actually have been building for .NET 1.0 but that might be asking too much.