after using the analogue output of the Raspberry for a while with Pimusicbox, I received the Hifiberry DAC today. Unfortunately I didn't get it to work.
First I removed the bcm2835 from /etc/modules because I had the same problem as Alexander http://www.hifiberry.com/forums/topic/no-sound-2/
Now 'aplay -l' shows
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 
Subdevice #0: subdevice #0
I have still no sound and appreciate any help.
No sound - hifiberry + pimusicbox