The guys from TechPowerup report ATI has delayed the R600 GPU to the second quarter of this year:
I just got off the phone with ATI who informed me that the Editor's Day before the launch, which was scheduled around March 11, has been postponed to the second quarter of 2007, which means that there will be no R600 launch next month.
The reason behind the delay is because the R600 isn't where they want it to be yet. Instead of throwing it on the market too early thay want to wait a bit longer and deliver a competitive product:
"To better align our strategy with current market opportunities, we've changed the launch plan for R600. We are going to deliver a competitive configuration to market with an extremely attractive combination of performance, features and pricing, targeting a broader market segment in Q2. With the revised strategy, AMD will be better able to capitalize on the broad appeal of 3D graphics and DirectX 10, being driven in part by the growing popularity of Windows Vista™."