As you can see from the page linked to, 10.2.0.4 is the latest (and it's removed, as stated) version available. Note that it has/had software requirement including "Apple Mac OS X Server 10.5.4" (Leopard). The Install guide even adds "Only the versions listed in the previous table are supported. Do not install the software on other versions of Apple Mac OS X."
I think there may have been some plans or so to have a 11.2 version ready during this year... with destined quarted got rolled forward a few times. But now considering that 12.1 / "12c" (or whatever it will be) is on the way and that Apple already released Mountain Lion (10.8), I would say you'll have to wait and see what 12c delivers during next year.