Currently (V1.2) NPanday only runs with NUnit.
Gallio is quite similar to surefire - but for .NET. It supports most test frameworks out there:
At present Gallio can run tests from MbUnit versions 2 and 3, MSTest, NBehave, NUnit, xUnit.Net, csUnit, and RSpec. Gallio provides tool support and integration with AutoCAD, CCNet, MSBuild, NAnt, NCover, Pex, Powershell, Resharper, TestDriven.Net, TypeMock, and Visual Studio Team System.
Gallio also includes its own command-line runner, Echo, and a Windows GUI, Icarus. Additional runners are planned or under development. Third parties are also encouraged to leverage the Gallio platform as part of their own applications.