For the past year Keith Packard at Intel has been spearheading the new DRI3 extension for the X.Org Server. DRI3 (a.k.a. DRI3000) was originally conceived at XDC2012 in Germany while now it's ready for xorg-server 1.15. See this article and the many others if you aren't yet familiar with this major advancement to the Direct Rendering Infrastructure.
Beyond merging DRI3 changes to xorg-server master, Keith also put out dri3proto 1.0 and presentproto 1.0 protocol headers/specification.
More details on X.Org Server 1.15 will come in another Phoronix posting shortly.