Apple Thoughts: iDisplay or Air Display, That is the Question

"One of the really handy things you can do with your iPhone, iPod touch, or iPad is use it as an extra screen for your computer. Until now, though, if you wanted to use your iPad to extend your Windows system, you were limited to iDisplay."

Well no longer folks, as now you have an option, namely Air Display [affiliate link]. It is a universal app and goes for $9.99 USD, while iDisplay (also a universal app) sells for $4.99 USD [affiliate link]. I don't use either of these programs, but at least now you have options if you need something like this, and they are planning on doing a head to head comparison in the near future so that should be interesting.