wp-chunk download
You can use a plugin to automatically shorten the display of the long URL.
A great plugin called wp-chunk already exists to solve this problem for URLs in comments. You can modify the plugin to apply to posts by either replacing or adding to the bottom “filter” code with this line:
add_filter(‘the_content’, ‘make_chunky’);
Changes:
05/07/08 Version 2.1p
Modified for use [...]