the orange thing is actually a timing chip. the picture was taken after the Richmond Marathon and they use a little plastic timer that i just stuck under the velcro strap. I'm not too familiar with the nike plus hardware, but i'm sure you could fashion a way to hook it on. there's a forum on birthdayshoes.com where i'm sure someone has either addressed the issue or could answer. hope that helps and enjoy the shoes, i love mine!
In your avatar picture what is the little orange thing on your "barefoot running shoe"? Is that the nike thing for the ipod? I was just wondering because i plan on getting some of those shoes but just now thought how would i attach the nike running thing for the ipod.