one of the biggies, Ebay, Amazon would be a great boost and awareness would go through the roof
Hopefully. Amazon or eBay would be huge. Maybe Facebook or you tube will implement or accept it in some way too.
My guess is, ebay.com is on board with bitcoin, but when it goes up to corporate, it gets shut down, so it doesn't fuck with their PayPal business. I'll bet on Amazon being the first mammoth to accept bitcoin, they're just smart guys, and don't have a sunk cost in a legacy payment platform to worry about.