SOS stands for 'Spirit of Stonewall' (reference post 12). As per that press release in post 12 NAMBLA is suppose to be the same as Stonewall.
What is disturbing is the member list at post 1 for the Stonewall Vets.
I should have said, until now, I had never heard of SOS.
Yes, everything is disturbing about these groups, including the list of 'honorary' members. There is no honor in what these groups advocate.