Lists vs clouds

I've been looking at the Del.ici.ous site, specifically the 2 options of viewing the tags in a cloud or in a list. The list view is easier to read. The cloud view looks more dynamic and perhaps is good for communicating when it's not necessary to read every word. I noticed in the cloud view you can use the size of letters to give some words more importance than others, while with the list the words you put at the top carry more weight than those lower down the list.