What could be more ubiquitous than a wearable computer?
This posting, from a fabulous site called Pasta & Vinegar, links to and comments on a Financial Times article about wearable computing. The article makes the connection between the wearable computer and the mobile phone - which we "wear" for fashion and utility. The other wearable computer, of course, is the iPod, and with the Nike + Nano combination you have an amazing little bit of tracking technology.
The link address is: http://tecfa.unige.ch/perso/staf/nova/blog/2006/07/13/ft-on-wearable-computing/