If you're using the latest ‘N' grade wireless router, then to maximise the speed and stability of your Wi-Fi connection, a Netgear RangeMax Dual Band USB adapter will offer excellent performance.
Simply slot this Dual Band Adapter into one of your computer's USB slots, and you'll be able to securely connect devices at the push of a button, using Netgear's Push ‘N' Connect system, which uses Wireless Protected Setup (WPS).
This adapter will allow you to make internet phone calls, surf the net, stream video and play games from wherever you are in your house, far more efficiently and reliably. It is compatible with Wireless-G and Wireless-N devices from Netgear and other manufacturers, and comes with a USB extension lead and cradle for added convenience.
Seems a good price and cheapest I could find. My first post so please be gentle :)