First you can read one of the old posts here Live sports streaming, there you can get the FIFA world Cup 2010 Live Online. But i just want to post another option
ESPN
ESPN is offering FIFA world Cup 2010 Live Online for Visitors from US, If you are from US you can watch the games live online on this URL. If you have have VPN service you may access this service. you can view a list of Free VPN services below
1. 5 Free Online VPN Services
2. Top 5 Free VPN Services
Here you can see 10 options to Watch FIFA World Cup 2010 Live Online for Free!