Here are two very interesting references I encountered very recently:
1. A video-clip of Kirk Durston's presentation:
2. A paper again by K.Durston, which is a summary of his and his colleagues' 2007 paper on measuring functional complexity of proteins where they published remarkable results showing statistically significant amounts of functional complexity across a sample of 35 protein families. The interesting bit here is that to date, no one has been able to demonstrate convincingly that causation other than rational agency is capable of producing large amounts of functional sequence complexity. This newer summary is free from technical details and is easier to read for a non-biologist: