Soft Machines is a very interesting blog on nanotechnology and future technologies by Richard Jones who is also the author of the book "Soft machines: nanotechnology and life". The book explains why things behave differently at the nanoscale to way they behave at familiar human scales, and why this means that nanotechnology may be more like biology than conventional engineering. The blog follows on a similar theme with many thoughtful articles.
I especially enjoyed the recent article titled: Death, life and amyloids, which is about the good, the bad and the ugly sides of misfolded fibrillar proteins called amyloids. Check it out.