Never saw them on the Madison or Conti sites, are they a recent development?
Edit: Just looked on the Conti site and see them, higher max pressure, i think i shoulda had some of them but i really dont remember seeing them on the Madison site.
The Touring Plus's feel like they could roll over landmines n shrug it off though so the weight might be worth it.
Edit2: Had a look on the consumer Madison site and the only 'Contact' they have is a 20" tyre, all other search results for Conact are either the expensive Top Contact or the City Contact.
There is more to life than the madison site :-)
http://velokit.co.uk/cart_productdetails.asp?PRODUCTID=2807