Ok, I finally got my C# compile plugin for Delphi uploaded onto CodeCentral.
http://codecentral.borland.com/codecentral/ccweb.exe/listing?id=18845 As you requested it works on Delphi 6 as well as Delphi 7, and is free with source code. It works in the free Delphi 7 trial, with the free .NET _frame_work, on Windows 98, so everyone should be able to run it OK. The Interop support is really cool. Pascal programs can include some C# code and it will all be compiled together and run with a single click on the Run button, straight from the .pas and .cs source code. Try doing that with SharpDevelop or Visual Studio. Or you can compile pure .NET applications with just C#. And it fits in the IDE so nicely you'll forget it didn't come with it.