The weird thing is that any distributor who has ever tried to distribute Birdies has never done it for very long in the U.S. I don't know why, but it seems R&M don't really care about the U.S. market; witness that hardly anyone has been able to get one of the new monocoque frames though they've debuted it for a few years now. Also, the price they sell for is a deal breaker for most since you're in the custom bike price range with their intro model.
If Burley dropped Birdy after distributing them for only a few years, then you know something is wrong. This was during Burley's heyday too when they had tremendous pull in the bike market.