From Smashing Magazine:
2008 was a very good year for the WordPress community. The software was updated numerous times, leading to the recent release of version 2.7, and many new blogs dedicated to WordPress were created. Of course, tons of new hacks were discovered, which helped lots of bloggers enhance their blogs.
In this article, we’ll show you 10 new useful killer WordPress hacks to unleash the power of your favorite blogging engine. Each hack has an accompanying explanation, so you’ll not only unleash the power of WordPress but also understand how it works.
Listropolis' Take:
An amazing list! Usually, the "hack" lists are old hacks that can now be accomplished easily, and that almost everyone already knows about, but this is Smashing Magazine, so you know it's good stuff. The list has some surprisingly great ideas, and all are very simple to do. If you have a wordpress site, take a minute and read/bookmark this site as a reference.