Have you guys seen this yet?
The valve
http://rollertrol.com/store/en/universal-irrigation-zone-valve-kit/62-x10-irrigation-diy-extender-kit.html
The Z Wave hub- Mentions SmartThings in description
http://rollertrol.com/store/en/all/180-zwave-relay-controller-blinds-shades-window-openers.html