I'm trying to add a Chromium app window (chromium-browser --app=http://example.org) to the launcher. I've put together a .desktop file and it works, but all instances of Chromium get lumped together. If I've got a normal browser window already running, the app will be listed with Chromium. If I start the appwindow first, normal chromium windows will be listed with it. Is there a way to stop this from happening?
Making a new Chromium profile for the app works around the problem (this is specific to 11.04, 11.10 fixes this issue at the Unity-level.):
As long as you put a different path to each web application they will be treated as separate applications.