It remains to be seen whether streaming all events live online will help or hurt NBC’s ratings for the upcoming London Olympics, but there is one place it isn’t hurting: ad sales. NBCUniversal said today that it has sold $1 billion in TV and online advertising ahead of the Summer Games that kick off Friday with the Opening Ceremony in primetime here. That’s a new record and about $150 million more than the network pulled in for the 2008 Beijing Summer Olympics. Digital was a big contributor to the current total: $60 million in ads were sold for NBCOlympics.com and the NBC Olympics Live Extra app, three times the total in Beijing (national TV ads are up $100 million from 2008). NBCU is streaming every event — more than 3500 hours — this year, compared with 2008’s 2200 hours. The ad-sales total includes all NBCU platforms involved in the Games: NBC, the company’s fledgling ESPN rival NBC Sports Network, MSNBC, CNBC, Bravo, Telemundo, NBCOlympics.com, the mobile and tablet app, two specialty channels, and a 3D channel.