A bit behind the curve on this, but just bought a copy of QuickCursor, and I don't know why I waited so long. What it does is let you set up global key commands for your favorite text editors on your Mac, send whatever's in the current text field to them, and then when you close the document window the original text is replaced with your edited version. It's awesome if you want to avoid having to type into a text box on a web page, or find yourself switching between text editors frequently.
Just Bought QuickCursor
Collin Donnell
@collin