Recently, I’ve created two genuine WordPress themes from a CSS design.
If I knew well the plug-ins system, themes were a discovery.
And, hey, the theme system is very great and flexible.
Look for example K2 on www.getk2.com and its AJAX capabilities.
I’m planning to create a K2 design and migrate my blog to WordPress. Oh, and I’m going to develop and release a plug-in to implement languages categories, so I can continue to blog in french (mainly personal entries) and english (mainly technical articles).
In the while, here some functions I’ve just coded 😉