This is a very broad question, but an interesting one. I have thought about this very same question from time to time. I'm sure we've all mind-blastered this question. Here's the deal, whatever the NEXT BIG THING is, there are millions of thinkers out there trying to figure this one out.
Anyways, I thought this website was rather interesting when I ran across it. I see more companies starting to provide services such as this one slowly but surely. Make sure you watch the video and tell me what you think:
http://helloworld.com
It would be cool if a community of people on a blog, or forum such as this one put our minds at work and come up with THE NEXT BIG THING and launch from right here.
Just a few thoughts
KevinCamon