Useful Links

www.codex.wordpress.org/Blog_Design_And_Layout
- provides useful information with working with WordPress as well as customizing it for blog design and layout

www.blogging.typepad.com/how_to_blog/themes/index.html
-  provides assistance for customizing existing WordPress themes to suit one’s personal preference and requirement 

www.plaintxt.org/themes
- provides tips for using, modifying and customizing WordPress theme options