Now that our Theme Gallery is live, we thought we might show you how to install the suckers. We'll start with some disclaimers - installing themes will replace some system files (images) on your Pre, so we strongly recommend you uninstall them before an update. You're going to be going through a very similar process to the one we described when we told you How To Install Homebrew Apps on your Pre, including putting your Pre into developer mode.
If that doesn't scare you off, here's your how-to!