For what it is worth, I was looking for a way to cycle through categories and list all posts on one page in WordPress MU. I tried Alex King's Articles Plugin but couldn't get it to display anything. I ended up combining the post and category queries in a page template. This was pretty simple and works for what I've needed so far-- I also like that gives me flexibility in what is presented and how it is styled.
I started with the category query using parameters and styling to show empty categories, exclude Uncategorized, and show the category names styled as headers:
<?php
$categories= get_categories('hide_empty=0&exclude=1');
foreach ($categories as $cat) {
$catname = $cat->cat_name;
$catid = $cat->cat_ID;
echo '<h2>'.$catname.'</h2>';
?>
Then I started the post query calling $catid into the parameters and ordering posts alphabetically:
<?php
$posts = query_posts($query_string . 'cat='.$catid.'&orderby=title&order=asc&posts_per_page=-1');
global $more;
// set $more to 0 in order to only get the first part of the post
$more = 0;
// the Loop starts here
if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
After that I formatted the_title and the_content to suit my needs and followed up with
<?php endwhile; else:
_e('There are no posts in this category yet.');
endif;
} //end category query
?>
Not sure that is the best way to do something like this, but I'm adding it here for what it is worth.