How can I make Chromium app windows count as "their own application" in the Unity launcher?

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.):

To open a website as an app window, add --app=http://example.org to the launcher parameters for chromium. Making and using a new profile is as easy as adding --user-data-dir=/path/to/profile

As long as you put a different path to each web application they will be treated as separate applications.

  • Reference blog post
  • How do I put a web application on the Launcher?