X1900ATI seems to have gotten their mojo back.
They launched the X1900 series parts today, and every review I've read indicates that they are nothing short of phenomenal, even putting the wood to the Nvidia GeForce 7800 GTX.
Of course, I can't buy one of these until I upgrade my motherboard, because it's highly unlikely that they will make an AGP version, but it's still an impressive piece of hardware. Here are links to two thorough reviews:
Oh, and even better: this was a hard launch. Finally. Product is in stock and ready to ship.