You know, I've been wondering that question for sooooooo soooooo long!!!!
They are my dream doubles team!
I want them to play doubles together on a consistent basis, but looks like that won't happen cause Nastya already plays with Vera at most tournaments. GRRRRR!!
They could be a great team, I think. They are both top players and should both play a limited number of tourneys.... So they can play together.
On the other hand.... I think that they both need a partner with a relatively strong serve. Just to be safe on atleast half the service games....