This is for those who reguraly uses swaret or slapt-get and got the sound broken since a few days.
Well guys, I've just updated my system (a few weeks without doing it) and I saw that ALSA broke up, what I saw is that the ALSA package comes compiled for 2.4.27 kernel, so instead of installing drivers to /lib/modules/2.4.26 it installs them to /lib/modules/2.4.27 (Don't try to move them, they're compiled for different version).
How to get over this? Well I'd recommend to compile the drivers manually (download the source from alsa-project.org, uncompress and type: ./configure && make && make install), be sure to remove the current alsa packages before
Those who compile their own 2.6 kernel should also compile them manually.
You could also upgrade your kernel to 2.4.27 and you'll be able to use these packages
Last choice, downgrade to a alsa package compiled for your kernel (like the ones that comes in slack's cds that are for 2.4.26) and add alsa to your update utility exclude list.