Having had to sell the OpenACS a NUMBER of times I've never ONCE had any client ask about aD.
We get asked about aD a lot, so I guess it depends who your clients are. Ours tend to have read Philip's book, or are being advised by someone who has, and are specifically seeking out someone who uses the ACS. As such, they always want to know about our relationship to aD, aD's involvement in the OpenACS project, etc etc.
I'm not sure that a name change would make all that much difference as far as those discussions go, but hopefully it would make it clearer that no, we're not still following in their footsteps and no, there probably won't be a Java port. :)