The Gentoo Qt team has moved the qting-edge overlay to a new name and location. Please do not use this overlay anymore, and use the qt overlay instead.
If you use layman, run layman -d qting-edge; layman -a qt to move to our new overlay.
The new overlay can also be browsed through the following web frontends:
https://gitweb.gentoo.org/proj/qt.git/
See you there!