All of us who use Coda on a daily basis and on top of that we work as a team for sure that we use from time to time the function that this application has to share files with our network colleagues and edit them at the same time, something really magnificent, but it has a downside.
The downside is that for this to be fluid, you would have to activate the Bonjour of the fast files and also the read and write permissions, something that now cannot be done so fast as it requires more than one click per file.
What I leave you is an AppleScript that I have made so that you can activate it with a double click on said application, although the ideal is to assign it with a program like BetterTouchTool or QuickSilver to a keyboard shortcut.
Download | enable ShareWrite