I'm not sure how I feel about this AMD / ATI merger. I definately agree and have even stated in a previous blog entry that it would be great to see the ability to add a GPU to a motherboard the same way a CPU is socketed, and with AMD's modular chip architecture this will become a reality. However, I don't believe it is necessary for AMD to own a graphics chip company in order to carry this out. I believe that Nvidia and ATI would support AMD's endeavors in the coming years and develop expansion cards that work directly with the CPU. By purchasing ATI, AMD is potentially alienating NVidia and Intel, restricting graphic chip sales and limiting competition in the graphics market for both Intel and AMD. Besides, NVidia has been developing incredible chipsets and graphics solutions for AMD systems, and it would be a shame to see that disappear or to see AMD cripple due to competition from NVidia. This deal is still pending approval from ATI's board, and although this is a great deal for ATI shareholders, I'd almost like to bank on the deal falling through. Although I support ATI as much as NVidia, I don't believe purchasing ATI is in the best interests of AMD.
Update: Check out the Anandtech article concerning this merger.