Check out the Codex for some great comment plugins, some of which you may have to edit your sidebar.php. And if you have a widgets-enabled theme, it’s even easier – just upload the widget and activate it through your plugins menu.
I took a look and couldn’t find a single add-on that would allow me to show the text of the last comment posted on the home page. I saw a few that would link but none so far for the text itself.
13th link from the top on the codex page referenced above includes this:
Plugin Name: Recent Comments
Plugin URI: http://mtdewvirus.com/code/wordpress-plugins/
Description: Retrieves a list of the most recent comments.
Version: 1.16
Author: Nick Momrik
Author URI: http://mtdewvirus.com/
Yes I saw that one and tried it out. Unfortunatley it does just what is says, gives a list, not the actual text.
most recent comments will show the text, Ive used the plugin, I know.
READ the readme:
http://dev.wp-plugins.org/file/recent-comments/trunk/read_me.txt
samboll, that looks like an easier solution for this person. If ya cant be bothered to read the readme, then youre better off with a gui of some kind.