Don't really care or expect to be able to redeem on Virgin.

But finally being able to redeem AA miles on BA flights from US to UK will be a big plus for me. BA has better product and better availability for family travel (plenty of their flights have 4 or more seats in C and F open)

And it's not before time... it's ridiculous that CO, UA and US all get to reciprocate, US can recip with VS, yet BA and AA can't