Classic ASP support for IIS on Nano Server
Classic ASP has a well-defined feature set that is unlikely to ever change, has never required a GUI of any sort, and should be pretty easy to slot in considering IIS on Nano already has support for ISAPI extensions.
ADO/ODBC/OLEDB database access might be a bit trickier, but maybe could be implemented as a compatibility layer over ADO.NET? And technically, database access is not actually part of Classic ASP anyway, but rather an addon library.
This would be really helpful for those of us who just want a tiny dynamically scripted web interface for something, without all the overhead of ASP.net.