Well there are two schools of thought on this.
One is to use a soundserver like esd, arts or jack. I've heard terrible things about arts and esd being somewhat (but not a lot) better. Jack is meant to be the best but the least supported. All but jack can use either OSS or ALSA. Jack just uses ALSA.
The other method is to use ALSA's dmix plugin. It's already part of ALSA so you don't have to go compile anything new. You do however need to set it up. Some good instructions are at the ALSA Wiki
. I've managed to get this working but only for ALSA-aware apps. If an app uses OSS then I can't get it to work simultaneously with any other sound producing app. Apparently others have succeeded where I have failed.
Scruff, apparently SoundStorm uses the intel-8x0 driver. Try that.