My former team (now #74) has been around since the 1995 season (11 years) and have competed every year. Same school and sponsor since the beginning (Holland High School & Haworth). They've since added another sponsor though (Magna-Donnelly).
My current team (as Kelly said) is celebrating 10 years this year. It's quite interesting actually when I think back to 96, when such well-known names as Beatty and Wildstang were just rookies!
In a lot of ways things were different back then but in a lot of ways they haven't changed much. I remember in 1995 that it would have been quite possible to meet every single team member at the Championship if you tried. I can't imagine trying anything like that today!