There is an all in one printer I own, Canon MX860. It has a compact flash card that is accessible over the network using SMB. There are many results when one does an internet search for "SMB Mountain Lion". It seems as though SMB is still an issue for 10.8. That said, how are Hazel users working around the issue, that is, if indeed Hazel has an issue mounting SMB hosts.
Let me know if I can clarify any of the above.