Widgets are great and are really taking off at the moment. They're everywhere.
From Blogrush (hmmm...still reserving judgement on that one) to Widgetbucks which I'm running on my gift shopping website, to WidgetBox where you can pretty much widgetize (is that a word?!) anything as well as turn it into a Facebook application (pretty cool) in a couple of clicks.
Well, today I came across a very cool new widget - Spotback.
The fact that it shows related content right in the widget makes it very easy for your readers to jump to other posts - which is great for you since you're engaging your readership much more.
As a user of the widget, it saves your personal ratings and learns as you go - so it is then able to recommend other content which it thinks you might like.
They have three widget types - slider (for ratings), stars (for ratings, but different style) and sidebar (for serving related content). The latter of these also automatically generates tag clouds. All widgets are very customisable so you can match them to your blog very easily. I've left mine with default settings for the moment, other than changing the colour of the link text to fit in with my design.
The last really cool thing about this widget is that all rated content then gets aggregated into a news site, kind of like digg but with the ability to completely personalise which channels you're interested in. You can build your own news page layout and even include RSS feeds from any other site.
You can see Spotback in action below - try it out. What do you think of it?