This is too funny! No longer do you actually need to use your imagination to count sheep… the Apple App Store does it for you!
“Sheep Count” is one of the latest apps to come to the market, this is $0.99 and can put you to sleep in no time. Depending on how you set the sheep loose you can have an endless amount of sheep moving across your iPhone to count. Or if you really cannot sleep you can change the settings by such features as “Day” and “Night” and even set the time between having the sheep jump over the fence.
More info here