Skinning Wordpress
Skinning WordPress, or using Child Themes is something I've just discovered at work, although its been a hot topic for some time now. I've kept a suspicious eye on using blogs to build websites because I didn't want to have to learn how to make a WordPress theme myself to avoid endlessly re-uploading updates after new WordPress releases. In the past if you made customization to a theme, when you upgrade the theme you would lose your work. Or, you had to make sure to keep local copies and upload them after upgrading the theme so your customization would be in tact. WordPress Child Themes does away with that, and two products I've read about help you Skin your WordPress blog... safely.
The first is called Mimbo Pro which carries a price, although Mimbo is a free version. The second is Ian Stewart's Thematic - a WordPress Theme Framework that makes it easy to implement WordPress Child Themes.