Here's a description of the basic plane. Technically, a plane which is registered with the FAA (ie: Has an "N" number), would not be considered an ultralight, although in Canada and some other country's it would be.
At 600 pounds, this plane is well over the Max weight of 254 pounds for an Ultralight in the US. In the US a pilots license is required.
NB
http://en.wikipedia.org/wiki/Fisher_Dakota_Hawk
PS: There is a New special "Light Sport License" which is Not a FULL
Private Pilots license that might apply here.