Try Widgetbox. They have a feature called Blidget (on the left side of the page – below the menu). This turns a blog into a (resizable) widget – that can be added to other blogs/websites (e.g MySpace/Typepad. They give you the code to add. Did not see specific code for WordPress but you can use the generic code for a website – that adds the widget to a page or post. To add to the sidebar might take a bit more work, but I’m sure some techies in this forum can help.
