I found MIDKAR through one of the usenet contributors and joined the group. There are several members that sequence MIDI songs and they are super helpful. There have been several times when members of the Singular Sound Forum have asked me to work up BeatBuddy (BB) songs and I just could not find MIDI source files. The MIDKAR members have been able to fulfill the majority of my requests (which I try not to lean on too much).
If you like to roll your own songs for the BB, you are highly encouraged to take a look at the MIDKAR group and join—you’ll be happy you did.