Tough to watch this whole video, the way he talks gets pretty annoying, especially after the RC hearings:
http://tv.jw.org/#video/VODStudio/pub-jwban_201506_1_VIDEO
Go to around 8:20 where he gets into the pronunciation of Jehovah. Admits that accuracy doesn't really matter, what matters is what is popular, well known or well established. (Just don't try doing that when you want to grow a beard, celebrate your birthday, or any other well known thing the bible doesn't say anything about)
Another funny point is at 10:15 where he explains the name Jehovah has a "looooooong history" you know, all the way back to about 1530.
So I will stick to my favorite pronunciation since G-Jack has approved: Jehobo