It would be very nice to have a tool for Public Folders. I am currently analyzing our Public Folder environment, trying to work out a plan, and it looks like we have approximately 500 calendars. I'm running across permissions issues galore (those alone seem to be impossible to wrap my head around), and any time I run the tool I get "No appointments, meetings or reminders were found that need to be moved to the new time zone." However, as I'm looking at the calendar there are clearly DOZENS of appointments in the DST delta window.
After over a week of banging my head against the wall on this, I'm starting to regret not using this time to simply plan for upgrading our Exchange environment to 2007. Maybe this is the true, underhanded plan (kidding).
Thanks for the hard work Exchange Team... I'm sure (or at least hope) you're all working at least as many hours as I am.