The Soyntec Wiffinder 310 Backpack comes with its own WiFi detector, so you’ll never be lost for a signal. Unless you’re in a deepest darkest Peruvian jungle of course. When you’ll probably be lost for a lot more than some stupid wireless networking. €34.40 (laptop not included, but a clock is).
Wiffinder 310 Backpack has integrated a networks Wifi detector, with a screen that shows to the hour and the level of the WiFi signal when it is desired. Designed to take your laptop up to 15.6″ with all its accessories.