Simple workaround:

On Blackberry, copy/paste each note into the text portion of an Address Book contact. Then sync with PocketMac.

You might want to leave your "Notes" as text in Contacts. The PocketMac sync for Notes is only one way, from Mac to BB. By leaving each note in a contact, you get two-way syncing.

The only caveat is to check that each note does not exceed some character limit in the Contact text field. I tried to discover the limit but it seems to be undocumented. To date, however, I have never had a problem.