To upgrade, or not to upgrade…

So…I’m trying to decide whether or not to go ahead and upgrade to WordPress 2.0, the new release of my favorite blogging platform. On the plus side, it looks like they’ve really done a great job rebuilding some of the backend functions. On the other hand, I’m not certain how much it will break my various customizations that I’ve made to my template and such.

Anyone out there want to tell me some horror stories, or to reassure me?