As much as I love Goh Liu Ying, I don't really want to see ANY Malaysians win! Don't know why, just never been a fan of the likes of Lee Chong Wei, Tan Boon Heong/Koo Kien Keat etc etc...
Here http://www.youtube.com/olympics ,select the live games on the right. And here for badminton http://www.badmintonlink.com/Watch-Badminton-Live-Stream/2012_London_Olympics_Badminton