I wrote a plugin that repackages some existing functionality in a way that might be handy to some people.
Description: Allows you to condition how specific posts are displayed in your post listings depending on whether the post has a $post_excerpt in the db. By using the $content_or_excerpt variable provided by this plugin, you can display an excerpt and link for longer posts and the entire post for shorter posts.
* Display posts in a single category or in all categories. This plugin does not enable you to specify multiple categories.
* Offset: Exclude X number of recent posts from a listing.
* Replace problematic characters pasted from emails and word processing docs.
More info about Get Offset Excerpt Test: http://www.webcommunicate.net/index.php?p=9