I came across this via the e-cancer group on LinkedIn, but see they also link to Twitter (maybe Facebook and elsewhere?)
ecancermedicalscience is an editorially independent open-access cancer journal and online news outlet founded by the European Institute of Oncology in Milan.
European cancer research is of a very high quality but is fragmented, un-coordinated and slow in translating benefits to patients. Cancer care delivery is also excellent in some European countries but by no means all. If state of the art treatment was available to all cancer patients, the World Health Organisation has estimated that over 20,000 lives would be saved annually.
They see the future as free; free to publish, free to read and free to comment. They provide a free article publishing service as well as regular free news, opinion, and video interviews with experts
ecancermedicalscience actively encourages communities of sub-specialised scientists and cancer carers to exchange ideas and research, speeding up the time it takes from discovery, to patient benefit. It aims to improve communications between sub-specialised cancer scientists and clinicians by working interactively and faster – offering authors a rapid peer review process.
(This information is taken from the ecancermedicalscience home page
Although primarily for scientists and clinicians, patients, carers and patient activists could find this site useful – and they can post responses to articles, just as with bmj.