There are fewer RSS to Widget conversion tools than you would think. MuseStorm has one, but they're moving in another direction. I don't believe ClearSpring has one. Widgetbox has one in their "Blidget" tool.
And now, I was just alerted to NewsGator's widget publishing tool that allows you to convert RSS feeds to custom widgets. NewsGator claims that they're closing in on their one billionth widget served.
Apparently you can build your own widget design (or choose from some existing templates), combine multiple feeds, and build headline focused widgets targeting specific content.
Here's an example widget that I built from my RSS feed of RateItAll Reviews.

