The wireless Logitech TouchPad can be used out-of-the-box with Linux. The touchpad is recognized by the Linux kernel as soon as the included Unifying-Receiver is plugged into the USB socket with the following USB ID:
Bus 006 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
By using the Logitech Unifying-Receiver in total 6 wireless Logitech devices can be used in parallel, if they are compatible to the Unifying standard.
The hardware is recognized by Ubuntu 12.04 (Linux-Kernel 3.2.0-29-generic-pae) in the following way:
usb 6-2: new full-speed USB device number 2 using ohci_hcd mtp-probe: checking bus 6, device 2: "/sys/devices/pci0000:00/0000:00:13.1/usb6/6-2" mtp-probe: bus: 6, device: 2 was not an MTP device logitech-djreceiver 0003:046D:C52B.0005: hiddev0,hidraw2: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:13.1-2/input2 input: Logitech Unifying Device. Wireless PID:4011 as /devices/pci0000:00/0000:00:13.1/ usb6/6-2/6-2:1.2/0003:046D:C52B.0005/input/input12 logitech-djdevice 0003:046D:C52B.0006: input,hidraw3: USB HID v1.11 Keyboard [Logitech Unifying Device. Wireless PID:4011] on usb-0000:00:13.1-2:1
In Ubuntu 12.04 the touchpad can be used in parallel to a USB mouse. Furhtermore, Ubuntu supports all one finger gestures (pointer movement, left click, right click, drag and drop), two finger gestures (vertical scrolling, horizontal scrolling) and three finger gestures (scrolling up or down, backwards and forwards in web browsers).
The touchpad needs two AA batteries for power and has a power button at the bottom side to power-off the touchpad if not in use.