I have a box which I have been running Ubuntu on, but needed to switch 
to Debian to try an overcome a software package install issue. In 
Ubuntu, my sound device was located at /dev/dsp, but this is not found 
in Debian Lenny. Any idea how to get it to show up there, or what other 
path might be used instead?

lsmod and lspci show the following:

lsmod snd 45604 6 snd_intel8x0,snd_ac97_codec,snd_pcm,snd_seq,snd_

lspci 00:1e.2 Multimedia audio controller: Intel Corporation 
82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)