Sessions in switzerland
A list of international keysigning sessions and keysigning persons
ExperienceA german report what you have to remember if you organise a keysigning session.
What is a key signing session for?
A key signing party is a get-together of people who use the PGP encryption system with the purpose of allowing those people to sign each others keys. Key signing parties serve to extend the web of trust to a great degree.
From the GPG Keysigning Party HOWTO
Why should I participate?
What is the meaning of a key signature?
If you sign the public key of XY, this means:
I confirm, that the key I signed realy belongs to person XY..
See also the Meaning of a PGP/GPG key certificate