19 Tom James, Steve Williams, Pete Reed & Andy Triggs Hodge
33 Depends on how precise your quiz setter wants you to be! There were 28 main sports, but after breaking down Aquatics, Cycling, Equestrian, Gymnastics, Volleyball & Wrestling, you'll get 41!
Personally speaking, for instance, I'd certainly not have "Aquatics"...I can only suggest that you look here & decide what your answer should be -
http://en.wikipedia.org/wiki/2008_Summer_Olymp ics#Sports
36 Originally, a weasel called Snowple, but he wasn't liked & got the sack! 4 snow owls - "Snowlets" - replaced him & were called Sukki, Nokki, Lekki & Tsukki.
44 Chris Hoy
70 Vancouver
76 Yngling
HTH & good luck! :-)