I'm having similar problems to some others on here with respect to moving public folders from Exchange 2003 to 2010. I have ran the MoveAllReplicas.ps1 script and on the 2003 server I can see the new server added in the replication tab. However, nothing seems to be going over to the new server (its been about 6 hours, and there isn't even a folder name appearing). I have set the priority to "urgent" and "run always" in the replication area on 2003.
The 2010 server is working and I've successfully moved all the mailboxes. I did notice however in the ESM on 2003, under Tools --> Monitoring and Status --> Status that my new server shows with a red X, and the status is unreachable. Doubleclicking on that error advises "unable to conect to the WMI service. You will not be able to see the current status of the monitored resources and can not add disk or service monitoring resources."
I was able to move all the mailboxes using the GUI on the new server no problem. The old server can ping the new server by name as well.
Not sure if I'm missing something with the replication settings, or if I've got something going on with the WMI message mentioned...