I just saw an interesting presentation from Juhani Vuorio / Microsoft at Drupal Business Days. He described the design philosophy of the new Internet Explorer 9 and some of it's new features. The one that caught my eye in particular is the possibility to pin your site to Windows 7 taskbar.
As a disclaimer, I'm not a Windows OS fan in particular. I have a Mac both at work and home and before I could afford one, I was a long term Linux user. Still, Windows exists out there, and there are cases where it's the preferred OS - most of the major companies use it so the developers can't really ignore it.
The feature is simple enough to enable. Web page is made pinnable by adding a bunch of meta tags in the head section of the webpage. There's also a jQuery plugin available which simplifies the process a lot.
I've tested the jQuery plugin here at mkoh.net. It's not that obvious that the site is pinnable - there is no indication of it, but if you're running Windows 7, you can drag the favicon to the taskbar and admire the wonders of technology :)
There's a context menu available if you right-click the pinned icon. The plugin is configured to generate quick links from the main navigation to populate the menu.
Here's a link to the Microsoft's tutorial website. I strongly encourage visiting the site and playing around with the features as they might come handy in the future. The place where I expect to be using a feature like this, would be in building internal tools for customers, where the OS enviroment is pretty much locked down. Of course, since it's so easy to add to a existing site, why not actually reward IE fans for having the latest version of the browser ;)