The current inability to add listings to multiple categories is making this unusable for me.
I thought I had found a potential workaround..
See my post here http://comdev.eu/Forum/topic/545-creating-a-menu-link-to-a-specific-filter-search/
However, they say it cannot be done.
While we can use the tag system to bring some results, the layouts for tag search results would need a lot of customizing to be useful.
It seems that it would not be a overly difficult thing to achieve (Multiple Categories).
Is it going to happen ?