There will be a keysigning party at PGDay.(it|eu) in Prato/Italy. The event is the last track friday in the evening, probably 16:50-17:30 (that's 4:50-5:30 pm).
The keysigning will not start until all talks finished so everybody has the chance to participate.
If you want to participate you have to register your pgp key.
More information about this registration can be found on the PGDay website: http://www.pgday.org/en/keysigning-party