PGP keys

On Tue, Sep 09, 2003 at 01:41:20PM -0700, KevinO wrote:
/_
/_If you aren't set up with pgp/gpg you can read these messages but you can't
/_tell whether they were really signed by the author or not. Someone could have
/_forged the email and be pretending to be someone they are not. On some of the
/_lists that I am on this happens everyday....

Where and how is the best way/method of obtaining fellow plugger's keys?