In case anyone is interested, I've posted 8.0.0beta5 rpms here:
http://www.joeconway.com/postgresql-8.0.0beta/
Note that these are not "official" PGDG rpms, just my own home brew.
Also note that there is talk of an imminent RC1 -- hopefully I'll find
time to update the rpms within a day or so after that release.
Joe