There is a new Mini vMac development snapshot.http://minivmac.sourceforge.net
"Today's Development source snapshot includes a couple fixes from Mike Fort that make LocalTalk more reliable. The problem of occasional lost packets seems to be solved.
It also includes various maintenance stuff I've done on the LocalTalk emulation, such as splitting the platform specific code out to a separate file, which should make it easier to port to other platforms besides OS X. Actually the same Berkeley Packet Filter code probably should be able to work on various BSDs, and perhaps Linux. For Windows, perhaps the WinPcap library could be used.
I also made the LocalTalk emulation check the "Addr Search Mode (SDLC)" flag before discarding packets meant for other machines. This allows programs like "Network Watch" (from Cayman Systems) to work."