In advance of us having mat days again, check out my post on JJ evolution:
shirotoratiger.proboards.com/index.cgi?action=display&board=shihan&thread=1030&page=1
it explains why we don't do BJJ Brazilian Jujutsu,
while though we acknowledge the developments of the Gracies we don't do their JJ either,
and why the orignal Japanese JJ and Judo are still the source