There was a person who captured a Logitech Starburst V2 packet capture from one of their management machines.

Using a tool called JackIt, demonstrated either sniffing all text from a keyboard, OR injection of an emulated keyboard through the dongle.

IIRC, the mouse was a clone Logitech that was even plugged in to charge.

Ok this took me a minute to parse.

Someone at DEFCON captured the wireless data from a mouse/keyboard dongle. The dongle was connected to a computer that belonged to the organizers, possibly managing the Wall of Sheep. They were able to capture and/or simulate input from/to the dongle.

Nice.