Mozilla just released a very nice tool to help bring web based applications to the desktop.

Mozilla Labs Blog » Blog Archive » Prism

Prism is an application that lets users split web applications out of their browser and run them directly on their desktop.
Naturally, the first application I tested was Zimbra. I'm toying with the idea of migrating some of my end users who refuse to use the zimbra web app, simply because it's a webmail instance. There's a stigma that's associated with webmail and the assumption that it's not as powerful as Outlook.

I tested Zimbra Desktop, but in my evaluation, it's not ready for my users yet. Prism, however was very fast and uncluttered. It allowed me to make use of Alt-Tab and it had the appearance of a stand alone application.