Archiving by Category

Is it possible for me to archive my posts via certain categories rather than dates?

For example, I just used RSS to import my old entries from CuteNews over to WordPress. I would like those entries to be archived under the category CuteNews, but since they’re written in April (the CuteNews entries) if I archive ’em, all of my April entries will be archived.

I checked out http://wp-plugins.net and didn’t find anything related to my topic, and I Googled as well. Any help would be appreciated.