Courtesy of the CompTIA Product Manager for Security+, here's a link to download the objectives for Security+ 2008 Edition. They do ask you to fill out a form:

http://certification.comptia.org/resources/objectives.aspx

Please note that where changes have been made from the existing exam, those objectives have been called out by italics. The new exam will launch in October.

The main page for just Security+ is:
http://certification.comptia.org/security/default.aspx

Hope this helps,
Don