You can choose to show all posts from a category or show all posts except for one category. Title, sort order, and sort fields are all customisable. It creates a $scp_posts global variable that can be used in place of the stock WP $posts variable in the WP loop. Or you can use $scp_posts as the basis of as many WP loops as you need.
(Having more than one WP is the basis for a mini/multi blog on a site. Each category can become it's own blog. Look at my projects page for an example in the boxes on the left side.)
Check the read me for full instructions. You can view the source, or download the .zip file.
Todo: Make it smart enough to allow multiple categories as a parameter.