Briefly, yes its all essentially 'ported' to OpenACS4...
I and my team are currently finishing off acceptance testing, and therefore the production release is probably only days of now.
In actual fact OpenACS 4 supports both Oracle and Postgres versions (vitrually seamlessly)
CMS is working probably as well as it ever did, although I think there's general agreement here that it needs revisiting.
Mind you I'm not entirely clear what you mean by 'ported'. OpenACS 4 is radically different (and much, much better) architecturally.
I'm not all that familiar with older acs (i.e. 3.x) but I think its fair to say equivalent functionality exists in OpenACS 4, but its imlemented entirely differently.
Cheers
Simon
