I wanted to make sure that I gave a Link and Clink (Good one!) to the SharePoint 2007 features project out on CodePlex (Yea CodePlex, clap clap).
ULS logs can be very helpful, when you can read them that is. One of my favorite features is the ULS viewer by Scot of Scot’s SharePoint Stuff (http://scothillier.spaces.live.com/Blog/cns!8F5DEA8AEA9E6FBB!236.entry?wa=wsignin1.0) and he has a blog entry on the fun of writing to the ULS logs as well.
No wonder that Log Viewer is in the most popular list of the features.
SharePoint 2007 Features - Home