Anyone seriously interested in green building should bookmark or subscribe to GreenBuildingAdvisor.com's green homes blog. The blog is updated on a regular enough basis with interesting and reasonably in-depth case studies of sustainable building projects, pointing out key lessons from the build and detailing construction methods, energy sources, choice of materials and other key features. The host site itself is a very useful resource too - you can subscribe to RSS feeds here. The latest project featured is a refurbished Texas bungalow that boasts water efficient fixtures, low energy appliances, heat pump technology, low-VOC finishes and adhesives and  spray foam insulation around the building envelope.