You could always create an "acs/java refugee support" forum for those abandoned by aD. The irony of it: OpenACS community lends a hand to those left high and dry by dead company that not long ago more or less told said community to shove it. :)
OTOH who knows, perhaps RedHat will continue developing acs/java or find it a good home. AFAIK none of RedHat's plans for aD's assets are known.