Now this is an interesting idea at its core. Still, not all that sure what the demand for it will be. Oh its useful, but I am talking about actual numbers.

Just announced-
“CodeSmith 4.0 Beta 2 has been released and is now available to the public.  Here are just a few the new capabilities in CodeSmith 4.0:
CodeSmith Projects (.csp) - This feature makes automating your code generation process really easy and consistent whether you are working from inside of Visual Studio 2005, MSBuild, Windows Explorer, a command line / batch file, or CodeSmith itself.
ActiveSnippets - Imagine Visual Studio 2005 snippets, but with the full power of CodeSmith available to execute any logic or access any complex metadata (including database schema and xml data) to control the output of your snippets….. Source: davidhayden.com