I have created a simple widget that presents a new random quote from this web service:
Until it has been accepted for the BlogEngine.NET widgets codeplex page, it can be downloaded from here:
Tell me what you think. I will probably be fiddling with the style etc. of the widget over the next couple of days, but right now it is feature complete.
I had a heck of a time finding a web service that responded in a way that suited me. I have found Al Nyveldt's quote of the day widget, but it didn't suit my wishes. So I ended up with this.