This is a Visual Studio add-in that enables posting Gists directly from Visual Studio. To use it, open a text editor window, select some text, then move your mouse over the Gist window at the top right of the editor.
I haven't finished this, due to a frustrating Assembly Load bug in Visual Studio (VS will sometimes throw while loading the add-in, very difficult to debug). However, several people were interested in this as a starting point, so I'm releasing it so others can hack on it if they're interested.
In other words, don't judge me on the quality of this code :)