Public Folder with Exchange 2010

Hi

We are migrating from Exchange 2003 to Exchange 2010. We have a few concerns over public folders

a) As per our understanding with Exchange 2010 -  address book and free / busy - are not kept with public folders, so after the migration can we remove the public folder all together? Current MB DBs are configured with default public folder database (else the users won't update the OAB)

b) How can we add a second copy of public folder to DAG second node?

Regards

LMS