The OpenSocial Traffic Boost
Plaxo publicized the traffic boost that they received from being first to market as an OpenSocial container.

They couched their data in terms of the ‘connections’ in their service rather than in raw numbers; while it seems like marketing spin, Alexa data correlates that they have indeed had a traffic surge due to OpenSocial, and they aren’t the only ones:

It will be interesting to see whether this initial traffic boost can be sustained.
