@AnimeDefender: yes they are all one big group but they can still go off and do their own things or work together.
@Masterofdeath: Someone should really make a Fan-Fic out of this lol. Well they can monitor Light's computer and internet activities, and also monitor what he is watching on TV. Charlie can still do all of his cacultaions, Monk and Sherlock would brainstorm what they looked in Light's house and the rest of the team can follow Light in his daily activities in secret. In the end I believe that the team can pull a win within a week or two. Light is only human, he will eventaully make a mistake.