I really like Ultimate sport are you familiar with it?
Yes - it's also known as ultimate frisbee, a non-contact team sport played with a flying disc.  
I need to get one of the goals to put behind my house.
Then your backyard can be a playing field.  Ultimate sport was also developed in 1968 by a group of high school students in New Jersey.
That was not that long ago, I wonder how many people play now a days?
A lot of people play as it's part of a school physical education class.  The focus on the sport is a bit different than other sports - it focuses on self-officiating even at the highest level of competition.
I  think it would be interesting to see high level players play
It would - I'm sure high level players will be better at all aspects of the game.  They will likely be better at interceptions and have a very low incomplete pass rate.
Do the hold any tournaments for it>?
the Wham-O toy company, and thus the sport is not formally called "Ultimate frisbee", though this name is still in common casual use. Points are scored by passing the disc to a teammate in the opposing end zone. Other basic rules are that players must not take steps while holding the disc, and interceptions, incomplete passes, and passes out of bounds are turnovers. Rain, wind, or occasionally other adversities can make for a testing match with rapid turnovers, heightening the pressure of play.
Ultimate (sport)
Ultimate, originally known as Ultimate frisbee, is a non-contact team sport played with a flying disc (frisbee). Ultimate was developed in 1968 by a group of students at Columbia High School in Maplewood, New Jersey. Although Ultimate resembles many traditional sports in its athletic requirements, it is unlike most sports due to its focus on self-officiating, even at the highest levels of competition. The term frisbee, often used to generically describe all flying discs, is a registered trademark of