No, you aren't hallucinating: Macworld UK is reporting that a truly native version of OpenOffice (not the java-powered NeoOffice port) will be shipping next month. OpenOffice's journey to running on Mac OS X in a native format has been a rollercoaster ride over the years, with a post on their site in January of '05 basically nixing a native port altogether.
However, the stars have realigned and the port will see light of day after all. If you need visual proof, one of OO's developers posted some native screenshots on his blog. As far as when we can get our hands on a non-X11 OpenOffice package, we're tossing our chips in with Macworld UK's that we'll most likely see this release at September's OOoCon. Stay tuned.