I tried to find similar blog/s before but could not find. But there is a blog: SEQanswer http://seqanswers.com/, which is specialized in next generation sequencing, maybe you can find what you are looking for there.
I find GenomeWeb pretty useful, it's a molecular biology leaning news/info site, which hosts a few blogs, and publishes a "daily scan" of new developments etc.
ScienceBlogs is a good resource. They don't have any dedicated Cancer bloggers, but many of the bloggers often discuss cancer and mol biology: http://scienceblogs.com/
The U.S. National Cancer Institute hosts a couple of informative blogs: http://blog-epi.grants.cancer.gov/ and http://ncip.nci.nih.gov/blog/.
iust as a suggestion from my side, I am going often for phys.org, yet I would like to read also more focussed blogs. So I will have a look on the ones you recommended.