Oh, you want an O. Okay. O-1 visa is for people of extraordinary ability in the arts, science, education, business, or athletics. It is typically used by scientists, doctors, professors, very high level business people, and entertainers, but anyone world renown in their field can apply. The visa is usually given for three years or for the extent of the project, whichever is shorter.
The standards and extent of documentation required for O-1 are higher than H-1. If you qualify, O-1 can be preferable to H-1 for two reasons. First H-1 has a limit as to how many new approvals will be issued each year and when it runs out you have to wait until next year. O-1 doesn't have a yearly limit. Also H-1 has a limit as to the number of extensions, which O-1 doesn't have.
Also if you currently have J-1 with the two year return requirement you can still obtain an O-1 visa.
One disadvantage as compared to an E or L visa is the spouse of an O-1 worker is not eligible for work authorization.