Had the same problem (no sound). I've got the sound working by updateing the alsa-drivers to the devel-release (1.0.17rc3).
# wget f__tp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.17rc3.tar.bz2
# tar xvfj alsa-driver-1.0.17rc3.tar.bz2
# cd alsa-driver-1.0.17rc3
# ./configure --with-cards=hda-intel
# make install
also in my /etc/modprobe.d/sound a have a entry: "options snd-hda-intel model=auto" but I think this isn't nessesary since this should be the default... but anyway... sound is working kow.