This story, where they treated and apparently cured someone's cancer, by taking some of his immune system cells, modifying them, and putting them back, looks pretty important.
Found the actual papers the coverage is based on.
How it was done: removing T cells (the cells which kill body cells infected with viruses directly, unlike B cells which secrete antibody proteins) and using replication-incapable viruses to put in a chimeric gene composed of part of a mouse antibody against human B-cell antigens, part of the human T-cell receptor that activates the T cell when it binds to something, and an extra activation domain to make the T-cell activation and proliferation particularly strong. Cells were reinjected, and they proliferat...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.