This is Mariana Newland's blog called interlúdio. It is the best example I have found of how a blog can be used not only as a designer's virtual sketchbook. In it she posts her references, pictures, working process, illustrations etc.
clarissa campolina is a brazilian film maker/director that has won a lot of international prizes. she is part of a film collective called teia. in this project entitled wandering notes, she used the blog to keep a diary of where she filmed everyday and her findings. in the teia website we find a lot of tecnical information about this films as well as her other works.
ana luiza gomes a brazilian designer has three web addresses: her blog - where she posts her references and research; her website - where she has her portfolio and CV and her web 'store'- where she has her pattern designs for sale.