Adam Haynes has been illustrating for Nike 6.0 (their extreme sports label) for a couple years now and I think he rocks. His illustrations are so rich in detail, yet aren't necessarily made up of clean, straight lines. I first saw his work in a copy of Ride BMX magazine and loved his "rider's perspective", standing on the top of a massive drop off, waiting to just jump or roll into that huge transfer etc. This dude has a really bright future in the illustration game.
Thanks to UKAdapta for the heads up.
Check more of Adam's work HERE.