Please note: This article has been contributed by a user.
Currently Things cannot natively link to Entourage email messages by dragging into notes, as with Mail messages.
Since I knew that Entourage creates a series of files for spotlight indexing, I figured out the naming scheme and wrote this Applescript. View Script at Pastebin.com
It only supports revealing a single message at a time, currently. If you select multiple messages, only the last message will be revealed.
This script also supports Path Finder for those that use it.
Requirements: Entourage 2008 with Spotlight Indexing enabled.
Usage: