SPD Workflow Lookups

http://itfootprint.wordpress.com/2008/04/09/sharepoint-designer-default-workflow-actions/

http://office.microsoft.com/en-us/sharepointdesigner/HA102378301033.aspx

http://stackoverflow.com/questions/131238/in-sharepoint-designers-workflow-editor-how-do-i-get-the-workflow-initiators-us

http://davesquared.blogspot.com/2007/07/sending-email-to-group-with-sharepoint.html

http://www.shannonbray.com/2008_04_01_archive.html