How does Windows Azure perform load balancing?

Question

I was trying to read up on load balancing in Windows Azure, and all the information about it is extremely vague and non-specific. All I really want is a simple answer: how does

Answer 1

Ok to give a correct answer here - Azure DOES support load balancing in front of both web and worker roles (so the answer marked as best on this thread is completely wrong), but it does not support Affinity load balancing which is what jvenema was asking for I think. The current implementation uses round robin behaviour.