Meet RainCommander: a cool system that allows you to run your sprinkler from your tablet, smartphone, or computer. The RainCommander RC1200 is a 12-zone sprinkler controller that uses a WiFi logon technology to connect to your network, allowing you to control it from your phone. You can set up and manage your sprinklers from anywhere you happen to be. You can also give control of certain zone to others when you are not around.
RainCommander will have free iPhone and Android apps. The controller is not too bulky, which is a plus. You can use it to save water and control your sprinklers more conveniently. This product is on Kickstarter right now.