If you spend a lot of time outdoors, odds are you could use some extra battery power for your iPhone. So why not get it from something that's designed for away-from-desk use? The Mophie Outdoor Juice Pack Plus ($120) fits the bill, providing up to eight extra hours of talk time or seven hours of Internet use over 3G, and featuring a fittingly-colored orange and green case, as well as included GPS software to make sure you don't get lost out there.
Remember that crazy Sony dock that swiveled around, tracking faces and taking pictures while you chilled? Well, the Swivl ($160) is kinda like that, only it works with iOS devices, so it's useful to a helluva lot more people. Instead of tracking faces, the Swivl follows a paired marker, twisting side-to-side and tilting forwards and backwards to make sure you're in frame. It connects via Dock Connector to allow for remote control of the action, and also includes a tripod adapter, so you can use it with your existing pocket cam. Now if the photo's off, you've got someone else to blame.
Worry not about the ruggedness of your on-the-go audio solution by picking up the Yamaha PDX-11 Portable Speaker System ($100). It packs a four-inch woofer and dedicated tweeter into a small, octogonal enclosure that sports a 3.5mm input, top-mounted iPhone/iPod dock, and an integrated metal handle that makes it perfect for grab-and-go use.