What do I need to learn to start creating my own Wordpress theme?

yeah, what do i need to learn? i already know how to tinker with XHTML, and the such.

Public Comments

1. You will need to know some PHP, CSS, and understand WP-API hooks. A really good place to start is here: http://codex.wordpress.org/Theme_Development
2. There was some great information in this audio podcast that's a short but sweet rundown of WordPress features, functions, usage, etc. Hope it helps!
3. You have to learn HTRL,css and also php to start making theme.You must set up a environment so that your can have a preview on your theme. http://blogote.com