The newest version (3.0) of the Spartan3E complete data sheet came out a week or two ago. I just wanted to give my Kudos to the Xilinx folks for adding the DESIGN NOTE boxes complete with bright yellow attention symbol to address the design issues that wouldn't be apparent to the casual data sheet reader.
I've noted before that designers would appreciate full attention to detail in the data sheet as opposed to relying on the answer records or help line calls. The notes don't appear to detract from the technical "confidence" in the devices at all, at least for this engineer. It's fantastic to see the full disclosure.
Once the device tables specify "logic cells" as opposed to "equivalent logic cells" I won't have anything to complain about!