I’ve learned my lesson. Put Pinterest in a headline and the world beats a path to your door. It’s way, way too early to call social curation a bubble. On the other hand, I’m not convinced that Pearltrees has a real plan. Companies like Twitter, Facebook and Google are much more convincing when they play the “interest graph” card. Rather than making users do all the work, but best opportunities in interest graphing is probably for third parties to glue them together across those sources. Especially since the big three don’t seem to be talking much.