This is a great page that tells you all the wp_list_cats parameters.
http://codex.wordpress.org/Template_Tags/wp_list_cats
What is sorely missing is sorting alphabetically. While I have great looking output of my categories I'm wondering how you could prefer "ascending order" to be by ID and leave out alphabetical!!!! For the most part I would think a built in "sort asc" would be built in as part of the mysql command that could have been referenced here.
What I'm doing is placing this code (underlines added)
<___? php wp_list_cats('sort_column=id&optioncount=0&hide_empty=0@&use_desc_for_title=0'); ?__>
into the sidebar and spitting out beautiful looking categories. Unfortunately, it's not spitting them out alphabetically and I don't see a parameter to call to do so!