x11-libs/qt-4.0.0 doesn't install any demos. If USE=doc the demo documentation is installed (/usr/share/qt4/doc/html/demos*). If USE=examples the qtdemo launcher is installed (but qtdemo also for examples and docu) Only the demos themselves are never installed. The cool demos are found in the source tarball under qt-x11-opensource-desktop-4.0.0/demos. I don't know if the demos warrant a new USE flag, otherwise installing them together with the examples if USE=doc should be fine. Then qtdemo and the demos themselves are always installed together. Thanks. BTW the demos look really nice. :-) PS: Qt's metadata.xml says 'qt' herd, but bugzilla doesn't accept qt@gentoo.org in the "Assigned To" field.
Created attachment 62182 [details, diff] patch to install demos Here is a mini patch to install the demos if USE=doc
Should be fixed now (using "examples" use flag).