Tokyo-based Ubiquitous Entertainment has built the iPhone ARider, a portable head-mounted navigation prototype. It attaches to a standard bike helmet and is capable of delivering visuals via a Scalar Corporation T3-A retractable HMD. With the glut of AR apps hitting the market you’ll likely see a lot more HMD projects showing up in the near future. If you know of or are working on an AR physical computing project and would like to share, please leave a comment.

21th Century “Chonmage” ARider [via zikkir]