> Fortunately, from the skimming I did, it doesn't look like there's
  > case law on the matter, just an assumption that emails can't
  > qualify as privileged.

IIRC there was a court case in California where the judge ruled that email can't be privileged because the sysadmin can read the email. I don't know if that was overturned on appeal or anything though. It may have been a federal case too (what's California? The 9th Circuit?).