Planning for Cluster Continuous Replication --> Cluster Continuous
Replication and Public Folder Databases
http://technet.microsoft.com/en-us/library/bb123996(EXCHG.80).aspx

If you are migrating public folder data into a CCR environment, you **can
use public folder replication to move the contents of a public folder
database** from a stand-alone Mailbox server or a clustered mailbox server
in an SCC to a clustered mailbox server in a CCR environment. After you
create the public folder database in a CCR environment, the additional
public folder databases should only be present *until your public folder
data has fully replicated to the CCR environment.*

When replication has completed successfully, all public folder databases
outside of the CCR environment should be removed, and you should not host
any other public folder databases in the Exchange organization.

Greetings all :-)
I read about the case where public folders hosted on a CCR set cannot
support Public Folder syncs? Is that so?

What if that's all we have, that is one CCR set and one HUB/CAS, and we'd
need to do one way sync of PF contents "from" an Exchange 2003 in another
forest. Can do? Sure hope its doable.

Cheers.