Use your iPad as an extended monitor 04/06/11
With Air Display you’re no longer locked into the narrow confines of your laptop or desktop monitor. You’ll be able to wirelessly stream your desktop to your iPad. For example, you can do things like put your Final Cut Pro video scopes or your After Effects timeline on your iPad.
Buy an install the app Air Display.
Download and install the Air Display support software.
Restart your Mac.
Launch the Air Display app on your iPad.
Click the Air Display icon in the Mac menu bar.
Select your iPad from the device list.
To arrange your display, on your Mac go to:
System Preferences / Displays / Arrangement
Tips: Air Display is still in it’s early versions so it is till kind of wonky. It may not be stable enough yet to display any information that is too graphic intensive. This will improve over time as the software matures and device hardware becomes more powerful. (Note: Your iPad and computer must be on the same WIFI network)
Additional Security Information: (from the Air Display FAQ)
In regards to 802.1x wifi networks:
Unfortunately, most all university networks have added security blocking the ports Air Display needs open in order to connect. You likely won’t be able to use Air Display on that network. The only real workaround is to create an ad-hoc network and have your iPad join that. This will stop your Mac from having an internet connection unless it’s also plugged in via ethernet though.