Getting sunburned stinks. Getting sunburned a lot can eventually kill you. SunFriend is a fun-looking $50 wrist strap that won Intel's Make It Wearable challenge last month. You put it on, set its sensitivity depending on your skin type, and a set of LEDs lights up to tell you how much sun exposure you've gotten and can safely withstand.  When all 11 lights flash, it's time … [Read more...]