I checked out their widgets which reminded me of MacOSX Dashboard. However, I was unable to install Konfabulator on my machine as the setup failed due to the fact that I do not have admin privileges on it (the setup insists on installing Konfabulator for all users on the machine).
Anyways, I stumbled upon Kapsules (I don't remember how). Kapsules is like Konfabulator, but since it uses the Microsoft Active Scripting Engine, which is a part of Windows, one can write widgets in a lot of scripting languages.
I think Dashboard, Konfabulator and Kapsules simply rock, and the idea that they embody (XML based GUI markup) would do to desktop application development what happened to web application development by allowing people who are graphic artists (PhotoShop hackers) to play a greater role in determining the look and feel of an application than ever before, leading to applications with fantastic GUIs.