OK, I'll call it an SDK but for now it's just the query tool and ZIP file with the API help and a plugin project template for VS.NET 2008. I am also working on a tutorial page for making a plugin.

Mini SQL Query is at version 0.9.48 now (added some plugin base class helper stuff) and getting pretty close to a version 1 release. I have been getting good feedback and have a few things left to improve before I am happy to call this thing "version 1".