phoronix.com featured a nice first collected comments on the data sheets that AMD has released to the public covering some of the ATI graphic chips, and I especially liked this quote: “in less than ten hours of the specifications being available, GPU specifications were downloaded from the X.Org server over 70,000 times and ate up more than 1.3 terabytes of bandwidth!”
The data sheets are here: www.x.org/wiki/DataSheets