American Society of Notaries (ASN)
http://www.ASNNotary.org

The Signing Registry
http://www.signingregistry.com/

lots of helpful information for notaries
http://www.nwflnotary.com

Just Point and Sign (information and certification for mobile notaries)
http://www.justpointandsign.net

123 Notary
123notary.com
becomeanotary.us
123acu.net