Hmm, that's a tricky one, because when I enable ESD Skype stops working (no sound in, nor out). I was out for help on skype's forum and the only solution they could come up with was to disable ESD. Maybe I should nag on them a bit more then.
Edit (11 JUL):
Yesterday I wasn't able to give a more complete answer, sorry. Now I checked with synaptic and I have libesd-alsa0 installed. Should I still install libesd0 and the dev package too?
With ESD enabled and running and amarok running I cannot play anything in Totem. It simply freezes. I haven't tried other apps though.