X.Org 7.7 was released last week and following the katamari's debut there was a brief discussion about plans for X.Org 7.8. While it was quick to be discussed, don't expect X.Org 7.8 to come until late 2013...
Wasn't there some work left for XKB?
If it is I would really wanted to see this done!
Since it's kinda critical to using a lot of desktops and other computers.
most xkb development is happening in libxkbcommon rather than x itself. unfortunately the xkb spec is way too prescriptive to be able to usefully extend it, except for high keycodes which i guess are planned at some stage.