I worked at Achronix Semiconductor (San Jose startup) for over a year and a half designing Asynchronous Circuits. I can answer any questions about the specifics of designing these circuits.<p>Anyone interested in this topic should definitely look into the Cornell University research ( <a href="http://vlsi.cornell.edu/" rel="nofollow">http://vlsi.cornell.edu/</a> ). Unlike most researchers in asynchronous research, they still tape out chips.