Does no one have any ideas/advice on how to move Public Folders to a
SharePoint Calendar?

Have a look at these:

CASAHL ecKnowledge
www.casahl.com/solutions/MSExchangeSolutions.html

DocAve 4.5 public  Folder Migrator for SharePoint
www.avepoint.com/.../public-folder-migratio
n

Tzunami Deployer For Exchange Public Folders Migration
www.tzunami.com/.../TDExchangePublicFolders.aspx

I haven't used these tools, but am looking to do the same...

It's easy, but not en-mass. I know how to do it one calendar  at a
time.
1. Create the new calendar in SharePoint.
2. Connect it to your Outlook 2007
3. In Outlook 2007, navigate to the public  folder in question, and
in Outlook's calendar views, switch to the "By Category" one.
4. Select ALL
5. Drag all of those items over to your connected new SharePoint
calendar.