Don't let anyone tell you that phone straps are only for sissies and those with challenged motor skills. Even though they're not for us--not that we have anything against them--Gear Diary makes a compelling case for one that's both unusual and affordable.
The $12 strap they advocate has a small cube that slides along its 7.5-inch length that opens up to reveal mini-USB connectors. Those can then be used to charge your mobile phone, media player, or other handheld device by connecting it to the computer's USB port. It's also made of black leather, so there's one less reason to worry about your masculinity.