Wayland works with GTK3 and Qt5: http://www.chaosreigns.com/wayland/state/
It's down to applications migrating to those toolkit releases, or adding support for the Wayland protocol directly.
There was some discussion about this here: http://comments.gmane.org/gmane.comp.documentfoundation.libreoffice.devel/5527
I believe cairo is a popular option. Some documentation of the Wayland protocol is here: http://wayland.freedesktop.org/docs/
Wayland 1.0 was released, and they're planning to maintain backwards compatability from here: http://lists.freedesktop.org/archives/wayland-devel/2012-October/005967.html
could this be a task for some bright-minded student?
Why not? Submit a proposal. I think it's an important step toward native wayland usability.
Please don't add stuff to the GSoC list unless you are planning to mentor these tasks. This list only contains valid projects that have assigned mentors and that we are willing to do. I'm going to remvoe the waylay stuff again.
Please respect the project rules.
_Can_ I be the mentor for this project?
I have experience in GUI development using Qt, Cocoa, Carbon, a bit of WinApi, i'm developer of Lokalize KDE application, and i created and sent upstream several patches for Qt, kdelibs/frameworks.
I also have successfully participated in GSoC 2007 as a student.
Support is now there http://caolanm.blogspot.com/2015/07/libreoffice-on-wayland.html
Do we close this as fixed?
yes..., lets call this fixed in the sense that the gtk3 plugin works under wayland. There's still a bug or two, but the broad scope of things works.
Why didn't you post to the wayland mailing list? (I just did.)