How can I find out what devices support Skype video calling over Wi-Fi? How can I find out what devices support Skype video calling over Wi-Fi?  (I'm particularly interested in tablets.)
The Skype application description in the market lists the list of devices that supports video calling. As of Skype 2.5.0.108, video calling is supported on these tablets:


Samsung Galaxy Tab 7 (Wifi, Verizon, Sprint, Plus)
HTC Flyer
Samsung Galaxy Tab 10.1 (T-Mobile)
Acer Iconia Tablet (A500)
Motorola Xoom
Acer Iconia Smart


Devices that are not listed may still be able to do video calling, but Skype says that the video quality may not be as good as on supported devices. Check out Skype's application description page for the latest list of supported devices.