I've been working on this project since May. I told no one but my husband, a few very close friends and the world of Twitter. (Thanks to @supernovia for her support in convincing me that the Twitterverse cared.)
As time has progressed and I've grown more comfortable with the idea, I've slowly told friends and family.
I'm now at the point where I'm okay with telling the world.
(I did this video back in June, just after I finished writing my manuscript in 6 weeks)