There are plenty of resources around the web for defining “Anabaptism.” Here are a few notable links:

• A short little pamphlet put out by the Mennonite Missions network called “What is an Anabaptist Christian?”
• Robert Martin at Abnormal Anabaptist What IS an Anabaptist?
• Scot McKnight, based upon the Bender vision, at The Anabaptists
• This video produced by the Anabaptist Association of Australia and New Zealand, embedded below.
•  GAMEO, the Global Anabaptist Mennonite Encyclopedia Online, run primarily by the Mennonite World Conference.
• The Third Way Cafe has a number of resources on Anabaptist ideas.
• Anabaptist ideas are seeing a resurgence in the European world, especially in the United Kingdom.  You can find information at The Anabaptist Network