- Top-notch templates/themes (like Blogger offers!). Why isn't there a database of these on wordpress.org? No offense, but the ones on the net kind of stink.
- Increased protection against comment spam. Perhaps add the option to force a preview when commenting? I'm having a problem with this lately.
- Multiple blogs capability.
- Blog statistics. How many people have visited my site? Sure other programs can do that, but it'd be nice to have built in.
- Improve the comment input form aesthetics.
Otherword, WP is great!