I just upgraded my blog to the latest stable release of WordPress (Version 2.3.2), and updated my theme Royaleto its current version, 1.4, as well. Upgrades like these always seem easier before they actually begin . Strange how they tend to show problems and inconsistencies with other widgets, plug-ins, and the like. WordPress is much easier than MovableType to upgrade, as even with the tweaks and hiccups, I was still able to do it myself and without the need of hiring a developer!
One of the cool features in the current theme is the toggle buttons on the upper right of each post. The posts can be individually toggled opened and closed. This does not effect functionality much outside of printing, but anything to add interactive possibilities (such as to print a post without the sidebars) is a nice feature.