Leaders from payments companies active on Facebook shared their sometimes-conflicting views on how they see payments evolving, in a spirited panel today at our Inside Social Apps 2010 conference. Here are the highlights.

The single biggest question was how Facebook itself plans to grow its virtual currency, Credits. The company has been testing out Credits with a wide range of third parties since last year, following up on its initial tests running Credits in its Gift Shop.

Note: You can check out tweets from this and other conference sessions via the #isa2010 hashtag on Twitter.

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