I have recently begun working on biologically-inspired computing, and in particular am pursuing a new approach that I call “multi-cellular logic circuits.” These circuits are constructed from many identically-specified cells and undergo a developmental phase much like multi-cellular organisms. I plan to describe these ideas in much more detail here at Nerd Wisdom. Until I create those pages, you can visit this page to find a PDF and a PowerPoint version of a talk I gave on the subject at a conference in Santa Fe in May 2007.
EDIT: I have begun creating those pages. You can start here.