There's not exactly any shortage of ways to mount your iPhone or iPod touch to your bike, but there's decidedly fewer options that actually turn your iOS device into a full-fledged cycling computer that's able to replace those from the likes of Garmin. This new iBike Dash device promises to do just that, though. It not only houses your device is a protective, waterproof shell, but it includes an ANT+ speed sensor and is compatible with other ANT+ devices so you can measure heart rate and cadence. It also has room for an extra rechargeable battery to extend your run time, and it naturally makes use of a free app that takes advantage of your iPhone's GPS capabilities (no built-in GPS here to help out iPod touch users). Of course, all that means this one also costs considerably more than a simple bike mount -- look for the basic model to set you back $199, while the deluxe package (including cadence and HR monitors along with an extra battery and charger) runs $329.