If you're on Windows, open Windows Media Player, click File->Open URL, and paste the following link:
mms://a1576.l1165413575.c11654.g.lm.akamaistream.net/D/1576/11654/v0001/reflector:13575?auth=cbEcganaudncBdWdVcZcAaSa.dsaocmb4az-bgLLY9-jy-vga-vBFnBF&aifp=jsd&push=&prestream=gsad_USMarineCorp_669931_299380&onthespot=1&poststream=
(EDIT - the URL line is very big, so copy this post to notepad and get it there, or make sure to select the whole line above)
Or go to:
http://e3.gamespot.com/live.html?tag=event_nav;live
Due to start very soon (19:00 central European time)
My Mario Kart Wii friend code: 2707-1866-0957