In the spirit of this question…
Is there an indicator applet that tells me when I've received an email through any IMAP service? If so, where can I get it?
Ubuntu – Gnome applet for IMAP mail accounts
appletgnomeimapmail
Related Solutions
The only part that is handled by the indicators is the menus themselves. The window title and the window controls are all handled by Unity itself. So to do that specific effect you'd need to write an applet that did it.
But, there was something similar done on UNE back when it used GNOME Panel. You might be able to use the applet there and get some of the same effect. Or at least start you on your path.
You can remove the message indicator by removing the indicator-messages package by clicking on that link and clicking uninstall. Or by executing the following command in a terminal:
sudo apt-get remove indicator-messages
Then log out and back in.
Best Answer
Use CloudSN (Cloud Services Notification). It supports gmail, google reader, pop3, imap, twitter, identi.ca
http://chuchiperriman.github.com/cloud-services-notifications/ (PPA available)
The best part is that it supports multiple accounts and notify-osd.