What is Commonwealth Games (CWG) to be held in Delhi 3rd to 14th October 2010?
CWG is held every four year for members of Commonwealth, amongst others England, Canada and India. See full list here: http://en.wikipedia.org/wiki/List_of_members_of_the_Commonwealth_of_Nations
CWG is a bit like the Olympics only with other ...participants and other sports. See list of sports in CWG: http://www.cwgdelhi2010.org/ go to "sport"
If you want to cheer for India, you can join Culturewise cheering for hockey and badminton.