MiniMips, Philips Pager (Score 5, Informative)

The largest ascynchronous project (to my knowledge)is the MiniMips that was developed at Caltech 1997 and has 1.5 M transistors. It was modelled after the R3000 mips architecture.
The best selling larg scale asynchronous circuit seems to be a micro controler that Philips developed and used in a pager series.