Today we renamed kde-testing back to kde in layman. You should remove and add the overlay again:
layman -d kde-testing; layman -L; layman -a kde;
In other news,
Qt 4.6.0 final was released by Nokia yesterday. You’ll find ebuilds in portage’s ~testing. If you’re using stable and want to try it out, make sure you keyword ALL the ebuilds, or you might get ugly blocks 
A keyword file is available in qting-edge.
Upgrading world is the recommended way to go to avoid B blocks. If you don’t want to upgrade world, make sure your upgrade command includes all installed Qt modules or you will get blocks.
emerge -av1 $(qlist -IC x11-libs/qt\-)
Remember that “b” (lowercase b) blocks are automatically resolved by portage, just remove --pretend and proceed with the upgrade.
For those wondering, KDE 4 works fine with Qt 4.6
If you’re upgrading Qt from a previous version and your Qt apps misbehave, you should rebuild everything depending on Qt:
emerge -av1 $(for i in $(qlist -IC x11-libs/qt-); do equery -q d $i | grep -v 'x11-libs/qt-' | sed "s/^/=/"; done)
KDE 4.3.4 was also released yesterday, ebuilds are available in portage as usual
Lots of stuff to build, have fun!
[...] This post was mentioned on Twitter by Alex Alexander, George Portokaloglou. George Portokaloglou said: Time 4 emerge RT @wired_ New blog post in Linuxized:kde-testing overlay *renamed* – qt and kde status in gentoo – http://tinyurl.com/yehmcfb [...]
Thank you for the great job! We are back to bleeding edge Gentoo again!
thanks! QT 4.6 upgrade went great except kde-base/smoke seems to fail. (confirmed by another user too) anyone else fail on smoke? –> http://bugs.gentoo.org/show_bug.cgi?id=295573
[...] kde-testing overlay *renamed* – qt and kde status in gentoo [...]
https://bugs.kde.org/show_bug.cgi?id=211438
and some other bugs at kde.org related to qt 4.6 don’t indicate “works fine” status.
That guy is using 4.3.69 super-alpha KDE! What did you expect?
While it’s true you might need to rebuild everything that depends on Qt to get it to work right, several developers (and now users) are using 4.6 with KDE 4 successfully
I upgraded my system with the keyword list provided, then while rebuilding my Qt based packages, PyQt4-4.5.4-r4 failed to build due to sipconfig module. Keywording PyQt4-4.6.2, sip-4.9.2 and upgrading solved the issue. So, maybe, these packages should be added to that keyword list too.
https://bugs.kde.org/show_bug.cgi?id=211438
and some other bugs at kde.org related to qt 4.6 don’t indicate “works fine” status.
well, there were bugs, but most if not all known ones are solved. I know many happy qt 4.6 / kde 4 users