No, I don't think there have.
BUT- speculation is rampant (and not just on a.net) that Virgin is looking to join an alliance.
With the current state of BMI
, I am SERIOUSLY rooting for Virgin to join Star!!!
I could have far more choices here in the states to get to London that way... on aircraft I like, I should say, compared to UA
's very LACKING 747 coach product, and their halfway completed 777 refurb.
And I just don't see Virgin going with SkyTeam. I suppose it could happen, but I'm not seeing it.