Here are two widgets I'd like to see someday:
1. For my family's group blog, it would be great to have a widget that says "Logged in as:" followed by a fairly large avatar of the person currently logged in. For households with lots of kids (or adults), this should reduce the possibility of accidentally blogging while logged in with someone else's username.
2. A voting widget. For example: "Should we make our family blog private?" Click on Yes, No, or Don't Care. Click here to see current results (or just display the results right in the widget).