How do I combine the has_tag function and query_posts (the loop)

Hey,

Basically I have a Category Listings include posts WITH tags and posts WITHOUT tags.

I need to modify the loop so that it ONLY includes posts which have one or more tags assigned to them.

Is there a way do this?

I know there’s the “tag” parameter for query posts. Would have been great if could do “&tag=-*wildcardforalltags*”