Subject says it all. I have a couple 8.0.0rc3 databases (about 1/2TB of GIS data and am upgrading to 8.0.0. Note that I'll dump&restore when PostGIS gets out of the release-candidate cycle. If I don't need an initdb I'll probably go to 8.0.0 now. If I do need one I'd try keep running 8.0.0rc3 until PostGIS 1.0 launches.
(unless someone here has better advice)
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