At the Penguin Convention in Michigan there will be a keysigning party for Michigan and the
surrounding cities (Flint, Lansing etc.). Penguicon is open to the public, but registration is now at the door only for this year.  Penguicon will take place next weekend, April 18-20. in Michigan, US and the details can be found on the official website.  The keysigning portion will take place on Saturday.
More information on the Penguicon Website (http://www.penguicon.org/).