CSS code for the buttons:

http://webdesignerwall.com/tutorials/css3-gradient-buttons

CSS code for the background gradients:

http://www.colorzilla.com/gradient-editor/

Showing source code:

http://www.tjkdesign.com/articles/how_to_style_a_code_listing.asp

Theme based on AdaptiveTheme.

For Buffy, Angel, Firefly, Serenity, Dr Horrible, Doll House:

Joss Whedon and a thousand others