It's a good time for a contest. I noticed the ZaggSparq and thought about bringing it along on a 550-mile hike (NYC-Lake Placid) to power my iPhone. In 2010, i hiked from Mexico to Canada with my iPhone 3G and a couple of Solio chargers, which were pretty useless, especially when i got to rainy Washington State. If the ZaggSparq can deliver four charges for my iPhone 4, it might be 8.6 ounces worth carrying.