[wp-hackers] Custom Taxonomy Query - Select posts with a taxonomy AND none

[Mike Little]

Add terms to your custom taxonomies for "All Segments" and "All Price
Bands".

Assign those to the appropriate CPT's

Then always add "All segments" to segment search terms, and "all price
bands" to price band search terms.

That will achieve the results you want with exactly the method you are
using now.

Mike
-- 
Mike Little
http://zed1.com/