As with the beta versions, I uploaded RC1 to Debian experimental again. If you want to test/use them on Ubuntu 10.04 (Lucid Lynx), you can get packages from my “PostgreSQL backports for stable Ubuntu releases” PPA. Please let me know if you need them for other releases.
Just for the records, both Debian 6.0 “Squeeze” and Ubuntu 10.10 “Maverick Meerkat” will release and officially support 8.4 only, as 9.0 is too late for the feature freezes of both. Also, it will take quite some time to update all the packaged extensions to 9.0. As usual, 9.0 will be provided as official backports for both Debian and Ubuntu.