Ubuntu (Canonical) doesn't create or manage PPAs (Personal Package Archives), the PPAs are managed by their creators. I support the idea of someone creating an OOo 3.0 PPA, but this doesn't address the issue of which someone.
I agree, it needs a maintainer for backports or ppa :)
You could wait for the next release in october for the stable 3.0, or join the intrepid release? They'll probably have in the archives of the release that's under development
Actually once you've got it installed, it has an update manager. The thing that should be done is adding a seperate installation instruction for the beta. Something like:
Enter the DEBS directory and run
sudo dpkg -i *.debs
You can find the executables under /opt/openoffice.org3/program/
And we could call it ports! And you could update the available deb packages using rsync!
Also third party update managers work fine in windows where there are little to no permissions and no central package management, but on a linux system that's just asking for trouble.