Here are some good resources looking into the claims that Jesus never existed.
• Did Jesus Exist? – history of the Jesus Myth and a scholarly view
• Did Jesus Exist? The Historical Evidence for Jesus. by G. A. Wells
• Mike Licona’s review of Brian Flemming’s DVD The God Who Wasn’t There
• Scholarly reactions regarding the “Christ-Mythers.”
• ChristianCadre’s Historical Jesus page
• J.P. Holding’s Shattering the Christ Myth page
• Was Jesus Christ just a CopyCat Savior Myth?
• Was the Bible created by authorities to ‘control’ the common folk?
• Extrabiblical, Non-Christian Witnesses to Jesus before 200 a.d.