The X.Org Foundation hasn't firmly decided on their position of Canonical's Mir Display Server
The meeting logs for an X.Org Foundation Board of Directors' IRC meeting from earlier this month have finally been published to the X.Org Wiki
Oracle's Stuart Krietman began by asking "does anyone here take seriously the 'threat' of Mir?" Bart Massey responded, "Wayland is something we have agreed is part of the X.Org umbrella; Mir definitely is not." But he then said, "I would suggest we make a highly supportive and encouraging announcement [regarding] Mir...Emphasize that we think that it would be fantastic if Canonical could replace X on desktop in 12 months...All I meant is that we haven't yet taken a position on Mir."
Bart also added, "Given that Mir is a single-corporation effort, I don't think it's appropriate for us to be supporting it, but that's just my position..." Intel's Eric Anholt wrote, "I don't imagine many people seeing mir as the next big thing." AMD's Alex Deucher commented, "I mean if mir took off, we could support it as well."
This meeting took place two weeks ago and there was an action item for the foundation to issue a public statement about Mir, but so far that's been non-existent.