ARM is actually building this chip with Handshake Solutions, a Philips incubator. The work stems from Philips Research as early as in 1986 (yes that's 20 years from research to product), and has matured very much over the years. We used to have courses at our university explaining the basics behind these asynchronous designs. All in all I'm excited to see this technology finally in a product, and hope it will make my pda last yet a little bit longer.