I ordered two uppers from Rock River in early January. The first one came in about 10 days ago: National Match A2. The other is still on backorder: CAR style 16" fixed carry handle.
Absolutely crazy waits, especially since I've been seeing AR-15's fairly commonly throughout the Obamania going on. However, no one seemed to carry exactly what I was looking for. I could have picked up a flattop or standard A2 at my leisure. I've only seen one CAR style upper and never a NM upper at the local gunshows (and only on CAR style at a shop, and was enough $$$ that I was willing to wait.