This article is 2 years old. This is the latest update on the research:
> For the last year, many people have been working to make clinical trials possible. We are now hopeful that the first human clinical trials of anti-CD47 antibody will take place at Stanford in mid-2014, if all goes well. Clinical trials may also be done in the United Kingdom.
So it's coming soon... at least in clinical trials...
Edit: interesting that since I posted this, the post went off the front page. sigh @ opaque moderation...