A quick post to show you a widget I've been working on for the last few days: a widget to ad ads to your sidebar, which I'm actually using in the sidebar. You can see the back-end interface for it on the right. It has a few options:

randomize the ad positions
shows an "advertise here"button
add styling

For the "About Joost" widget shown on the homepage of this site, I created a new widget. It has two great features: it shows just on the homepage, and the content and title are drawn from a page, so that I can edit it as a normal page with the richtext editor in the backend