Designing your own WordPress theme can be a daunting task for any non techie blog owner or non-designers etc. I have put together this small list of available WordPress themes.
http://www.kaushalsheth.com/themes
http://themes.wordpress.net/
http://www.templatemonster.com/category/wordpress-themes/ (paid for templates)
http://beccary.com/goodies/wordpress-themes/
This one
Some are duplicated but a good selection overall.

One of the main decisions a web designer has to make when designing or re-designing a website is whether or not to use a fixed width, say 780 pixels, or a fixed percentage, say 80% for the website’s width.
Most of the time, when I’m starting a site I tend to lean towards the fixed pixel [...]