https://rationalwiki.org/wiki/Atheism_Plus
Apparently we have at least been doing our part in keeping the memory alive.
Other insights:The initiative largely went nowhere, and even proponents don't really use the term anymore. The phrase remains current, deployed as a snarl word by Reddit anti-feminists, Gamergate, the Slymepit, fans of Thunderf00t and other assholes who are active in atheist circles.
In contrast to this straw-man vision of feminism, Atheism Plus is explicitly not sex-negative, although it is emphatically opposed to creepiness and sexual harassment. Thus, while those who bring such flak against it probably think they are arguing for Free Love or something of the kind, in the real world it works out to arguing for the legitimization of sexual harassment.
Although Atheism Plus began with a strong emphasis on the feminist part of its formal agenda, this was partially due to its roots in a response to sexual harassment and sexually violent language being tossed at women within the atheist community, and partially due to the actions of the misogynists themselves, who have kept the focus on gender issues. For example, there has been nowhere near this level of controversy over the anti-racist plank of the Atheism Plus platform (but no doubt there are some Bell Curvers out there waiting to inject some "race realism" into the matter).