I expected that with WordPress 3.1 I wouldn't need your plugin anymore. But that is not the case. It works to show the custom posts in the blog and in a list (archive page). So, thank you for this plugin!
I couldn't get "Query Multiple Taxonomies" to work on my custom posts without it.
One thing you could clarify in the Help page: it says if you click "active" it will do 5 things, the last of which is a feed. But there is a separate checkbox for the feed, is there not? Or does "Include in feed" refer to the main blog feed?