Just
as planned, Intel has released their quarterly DDX driver update for Linux users and those using X.Org with its KMS-only support.
The xf86-video-intel 2.11 update brings
page-flipping support,
DRI2 swap events,
Sandy Bridge GPU support, performance improvements, and other changes. The new Intel X.Org driver update also has many bug-fixes for X-Video, XvMC, dead code removal, and DRI2.
The xf86-video-intel 2.11.0 driver release announcement can be read on the
Intel mailing list.