Can I use this item to connect Arduino to wifi? http://www.ebay.com/itm/2PCS-Arduino-NRF24L01-2-4GHz-Wireless-Transceiver-Module-New-/170819064718?pt=LH_DefaultDomain_0&hash=item27c59c138e
It's much cheaper than shields. Not a big fan of shields anyway. If I wanted to pay someone 3x as much to build my electronics for me, I wouldn't be playing with the Arduino.