Create Your Own WordPress Widgets
Now anyone can create their own WordPress Widgets! This really rocks. Use it to create your own custom wordpress widgets.
There are many WordPress plugins that should be converted into sidebar widgets, made compatible with the Automattic Widget Plugin, but, for whatever reason, have not yet been converted. Wouldn’t it be nice if there were a generic way to call other plugins from within a sidebar widget? Now there is! Introducing…. Widgetize Anything!
Basically, it works just like the built-in text widgets, except that it allows you to put in PHP code into the body of the widget.