I've uploaded a beta version of a new max external that i made in order to sync drum machines and sequencers that use dinsync, such as the 808, 303, 606 etc to Max.
It works with a suitable audio interface that passes DC, such as most MOTU interfaces. An added bonus is that you can slew the dinsync signal in order to make the drum machine swing.
To do this i had to solder together a cable to go from two 1/4" jack outputs on my MOTU 828 MkII to a dinsync 5 pin din connector. You can find info here about what pins to connect to what: http://www.doepfer.de/faq/gen_faq.htm#Sync
Download it here: (windows and mac, source included)