Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold)

A note for those attempting to use Ethernet to Airplay mirror:

Your router must allow multicasting between WLAN and Ethernet clients, otherwise your Pi won't show up to iDevices connected via WiFi.

If this is a problem for you (as it was for me) your only solution is attaching a WiFi adapter to your Pi. The consensus for best support, lowest power and tiny footprint is Edimax EW-7811UN (http://www.amazon.co.uk/gp/product/B003MTTJOY).

I just grabbed an old Linksys WUSB54GS that I had laying around and it played nicely with the Raspberry Pi with little to not effort.

what RPi kit do i need to buy to make this work? Do I need the complete starter kit, will that block the usb?

edit: here's what i purchased:

[1] CanaKit Raspberry Pi (512 MB) Complete Starter Kit (Raspberry Pi 512 MB + Black Case + Micro USB Power Supply + Original Preloaded SD Card + HDMI Cable)

[2] Edimax EW-7811Un 150 Mbps Wireless 11n Nano Size USB Adapter with EZmax Setup Wizard

[3] SanDisk Cruzer Fit CZ33 32GB USB Flash Drive (SDCZ33-032G-B35)

[4] Preloaded SD Card for Raspberry Pi (16GB, Raspbian "wheezy")

[1] http://www.amazon.com/gp/product/B00DLUXD64/ref=oh_details_o... [2] http://www.amazon.com/gp/product/B003MTTJOY/ref=oh_details_o... [3] http://www.amazon.com/gp/product/B00812F7O8/ref=oh_details_o... [4] http://www.amazon.com/gp/product/B00AYH22VY/ref=oh_details_o...

The construction of this device is quite impressive, in that it fits entirely inside a USB plug

The level of miniaturisation is not all that impressive, these have been around for a while:

https://www.amazon.com/Edimax-EW-7811Un-150Mbps-Raspberry-Su...

There's no mention of using the rest of the cable as the antenna, since in my experience the above tiny adapters have an equally tiny antenna and thus poor reception.