Proving once more that the best ideas are often stolen, Digg has launched the DiggBar, an iframed toolbar that offers a range of features.
At its core, the DiggBar is naturally a voting platform for Digg. Users can Digg a site while on the site via the frame, and if the page is not already in the system, use the DiggBar to submit it. Along side the service is a handy URL shortening feature that is used by adding digg.com in front of any URL in a browser. Socially, the DiggBar supports related content and "random" content, so you can navigate through items that have previously been featured by Digg.
If those things all sound familiar, they should, because URL shortening aside, it's a dead copy of what's already being offered by StumbleUpon (who now offers a similar iFrame toolbar) and Reddit (via the Socialite plugin). Some sites have gushed over the DiggBar, using superlatives such as "amazing" and "incredible;" yes, the implementation is solid, but the idea is none of those things. Forgive me that unlike others I'm not interested in dropping my head into the crotch of Kevin Rose with my mouth wide opened.
What is interesting though is that Rose and company have decided to take on StumbleUpon with the move, although admittedly it's not in the same league yet (no category surfing for example). There's talk of ads appearing in the DiggBar, but it should be remembered how StumbleUpon makes money: by selling page views that are added when users are stumbling. It's a solid business model, and from experience, a great way to advertise a site. Here's betting that Digg wants a slice of this action as well.