The Guardian website has a special page, Nanotechnology World, dedicated to news on nanotechnology. The site is associated with NANOChannels which is an education/dialog project funded by the European Commission.
Nature Publishing has produce the special supplement Nature Outlook on Graphene. It's a collection of article published of the last couple of years on the material. The articles all appear to be open access (only looked a few so far).
Inderscience Publishers produces many technical journals in science and technology. The list below shows just a few of the journals related to nanotechnology.