I like to use the the_excerpt() instead of the_content() in several places on a blog. However, I did not like the fact that the_excerpt was only showing 55 characters. I could change it in the WordPress code, but then everytime I update the blog with a new version of WordPress I have to remember that the change is there.
CyberExcerpt is simply a copy of the_excerpt routine in a plugin. The advantage to this is I can change the_excerpt length, turn on the plugin and I have my solution, a longer excerpt.
If you want an excerpt with a length other than 55 characters, just download the zip file, unzip, and then upload the CyberExcerpt folder to the /plugin folder and change the value in line # 24, then call the_excerpt() as you normally would.
$excerpt_length = 100;