Currently the default list contains "Regular sidebar" and "Featured Page Textwidgets".
1. How do I add more sidebars in the dropdown menu in the administer widgets interface?
2. Lets say I have added "side1", "side2" and "side3" in the list.
How can I display "side3" in my_custom_template.php?
I've read these posts, but didn't help me much.
http://codex.wordpress.org/Plugins/WordPress_Widgets
http://wordpress.org/support/topic/169282?replies=23