To kick off this year's U.S. Open tournament, Nike is releasing limited edition versions of the signature shoes worn by Roger Federer and Rafael Nadal. The limited edition Air Zoom Vapor V ($200) and the limited edition Air Max Breathe Cage II ($200) feature the the players individual logos and special new colorways. Sold only at Nike.com and the Nike tent at the U.S. Open, both shoes only come in whole sizes 9-12 and are expected to sell out pretty quickly. [Thanks, Eric]