Interestingly, Ren points out Delicious as the only competitor to his service that’s still innovating. However, it looks like traffic to Delicious is falling off, while StumbleUpon has spiked upward according to Alexa, Compete and Quantcast (click through for the charts). That may mean that the average user is actually interested in a less full-featured service.
Around the corner is Delicious 2.0 (coverage on that from TechCrunch), so we’ll soon have a chance to see.
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