[Users] Searching for VMs that do not have a tag

I have to say, the Search & Bookmark functionality is really cool! According to autocomplete, the only operator available for Vms:Tag is = It would be nice to have a != operator so we can have bookmarks that show hosts that are not tagged in a certain way... or is there a more general way to invert a query? Also, is there any way to add an order tag to alter the display order? Any online docs for this stuff? regards, Rob