9 to 5 Mac reports that the Apple TV is out of stock nearly everywhere. This means that a new Apple TV will likely be announced and quickly put on sale shortly after the early March iPad event.
I just talked about the Apple TV and wireless mirroring with iOS 5 in education at the NCACDA convention yesterday.
My personal hope is that they put a thunderbolt port on the device so
It can be used with HDMI or VGA, yes, an extra adaptor would be needed, but an adaptor is far better than a converter (currently a HDMI to VGA converter is needed for most schools to link a projector to an Apple TV).