He's been working on it at for years and years. Think he had the thing tethered in 2008?

You'll note that the one people can get on is a whole helluvalot different from the one they're trying to get you to invest in. I'm pretty sure the two-rotor one never made it out of ground effect, and I think even those guys figured out that precession and aerodynamic interference were going to make the thing death on a stick. So what they're sort of going for now is yet another man-sized quadcopter with the pitch between port and starboard rotors greatly curtailed.

It's interesting to me to see all these "mad scientists" scaling up RC aircraft to people-size, rather than taking functional aircraft and scaling them down to individual. Take the Volocopter:

...okay, 18 rotors and a bunch of batteries and you get 20 minutes duration for $338k. OR, for $270k you can buy a Robinson R22 which will go for 2 hours at 120mph on 17 gallons of avgas and has done since 1973.

It's like they're afraid of gasoline or something. Here's the Hiller Pawnee in 1955:

Here's the Williams X-Jet in 1969:

But people put ridonkulous soundtracks behind things like this:

(Did you see that thing get out of ground effect? I didn't)

But here: check it out. Mosquito XE, $38k USD with engine, all you gotta do is put it together (and get at least 10 hours of training to get the discount... probably not a bad idea...)