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Plaxo, which is now under the Comcast umbrella, now supports Google's Friend Connect. With Plaxo's integration, you're able to see which of your Plaxo contacts are also on sites that support Friend Connect, and invite Plaxo friends to join the site as well. There's Plaxo Pulse integration too, so any activity that occurs on Friend Connect-enabled sites can be streamed and re-broadcast through Plaxo Pulse.
So with open standards like Friend Connect, Plaxo is able to act as an activity aggregator and redistribution tool, portable contact list, and recommendation service for new websites. Will Plaxo be moving even further towards recommendations based on Pulse activity? I wouldn't be surprised, but for right now, this is yet another step down the road towards a more socially fluid web.
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