I'll spare you the detailed description, but just imagine what a toe might look like without any toenail at all! The vet said we'll probably need to get an x-ray to make sure the bone itself doesn't get infected, which would neccesitate surgery to remove the toe. Ugh.
(Sidenote: I enjoyed a much cheaper and probably much more pleasant pedicure in the San Francisco Airport before heading home: airport gate-side spas? Genius.)