I've had several emails today following last nights TechNet event - an Introduction to Windows Server 2003 R2. The most popular question by far is how can people get hold of it? The answer is on microsoft.com, where you can either register to receive an evaluation CD set or register to download (but bear in mind the downloads are not small). General availability for R2 is expected to be around Feb timeframe next year.
Windows Server 2003 R2 Evaluation Software Download Site