BitLock offers a bring-your-own-bicycle approach to bike sharing | @Engadget

Unless you're an enraged motorist, there's plenty of good to be found in the current push for big city bike sharing programs. BitLock is certainly in keeping with the spirit of such initiatives, albeit on a much more localized scale. The proposed product is essentially a standard bike U-lock that communicates with Android and iOS devices -- get within proximity and click the unlock button on an approved handset and the BitLock opens up for you. The device is, thankfully, weather-resistant and has a battery that should last up to five years, according to claims (and you'll get a notification on your phone when it's finally ready to shuffle off this mortal coil).
[Keep reading at Engadget]