Ask Slashdot: Is There a PGP Key Repository?

Martin Foster asks this question: "I noticed that a lot of Sites, such as Sendmail.org, Kernel.Org et cetera, sign all their downloads with a PGP Signature. While this is useful, getting a copy of this key can be a bit more difficult then it looks. For example, I have yet to be able to retreive the key from Red Hat's page. I had to look though the PGP Keyserver and guess which one was the correct one. Is there a site on the net that just stores such keys? Making it a central place to get any key needed to veryfy if a file is really as it seems?" A centralized, trustworthy place for downloading public keys seems to be a good idea. What do you all think?