Mark de Berg (secretary of the SoCG steering committee), sent out an email to the compgeom mailing list that starts:
Since its start 27 years ago, SoCG has always been affiliated to ACM. This means that the proceedings are published by ACM, and that the symposium is organized “sponsored by ACM” (more precisely, sponsored by ACM SIGACT & ACM SIGGRAPH) or “in cooperation with ACM”. The latter happened only a couple of times, namely when SoCG was in Korea in 2007 and when it was in Denmark in 2009. Being affiliated to ACM has certain advantages, but also certain disadvantages, as detailed below. Hence, at the business meeting of this year’s SoCG in Paris, an alternative was discussed: organizing SoCG as an independent symposium, with the proceedings being published by Dagstuhl in their LIPIcs series (see below). A straw poll was taken, and the vast majority of the participants wanted the Steering Committee to investigate this issue further, which we do through this opinion poll. We hope you want to participate in this important poll.
If you have an interest in how the relationship between SoCG and the ACM continues (or doesn't), I'd strongly encourage you to participate in the poll. The poll documents