Im not sure if this should be a separate thread, but just thought Id let MBA and iPad owners know that you can use the iPad as a second monitor using an app called Air Display: http://avatron.com/apps/air-display
The app I believe is $9. I just set it up on my Air. It will come in handy when Im writing articles and need to park a web page or other application window over on the iPad screen for easy reference.
You cant use the Air to park files onto the iPad display, but you can slide open windows, documents, and applications. Its a wireless, networked (Wi-Fi) setup, and it works great.
This is indeed how I sometimes use my MBA. I was used to a bigger screen resolution before getting the 13" MBA and especially when traveling, I could really use more screen real estate. Having my iPad parked right next to the MBA lets me show another document on it, or a screen browser. This is great when writing and using other sources as a reference material. It is the most compact dual-screen solution I'm aware of.