My gut feeling is that Bing is on the rise and I think the gradual improvement in the number of referrals from them has been improving across a few of my sites.
Then neither of you have a clue what is going on in the world. Bing hasn't budged since its inception a year and a half ago.
I would love to see bing rise, but that is going to tough. They have surpassed search.com easily but now they need to pass yahoo and the all mighty google. I am just kidding lol but still they have grown and got much more traffic, I must admit.