Ok, I finally figured it out....or at least I was able to hack a way to
do it.  In my file C:\Documents and Settings\<myusername>\Application
Data\Microsoft\Outlook\MS Exchange Settings.xml, the <sharedcalendars>
section was missing.  So I copied it from somebody else (I had to copy
the whole thing even though I don't need all of the calendars that he
did) and pasted it right after the <calendars> section with outlook
closed.  When I opened outlook again, the "Other Calendars section was
there again and I could use it as I could before.