Quoting Brett Pemberton (brett.pemberton@gmail.com):
Just noting for comparison I'm currently running KDE 4.7.2 on Ubuntu.
Good to hear. In fact, one of the original reasons for the founding of the Ubuntu Project was timely provision of coherent suites of leading-edge GNOME and KDE packages on (just) i386 and x86_64, without having to wait for Debian's QA to bear fruit on all 13[1] supported CPU platforms and without the sometimes uneven availability of _all_ of KDE or _all_ of GNOME at a certain release level that one has in Debian testing. FWIW, double-checking the Debian packages currently on unstable=sid, I do see some 4.7.1 packages -- along with some 4.7, some 4.6.5, and some 4.4. [1] Number is from memory, and things have changed a bit since then, as two new ports have been introduced as 'technolgy previews' (kfreebsd-i386 and kfreebsd-amd64), some former main platforms such as alpha, m68k, hppa have been relegated to 'unstable ports' so as to not hold up releases any more, and some new 'unstable ports' have been added.