Get started, entrepreneurs. You're living in an exciting time.
nytimes.com
nytimes.com
I think the exciting web stuff has mostly been products that create totally new user behavior and lack direct analogues in the physical world.
Consider the "Epidemic Watcher" idea. This could be easily implemented with the Google Maps API, tied to a medical news aggregator and partnered with WebMD. Now it may sound silly to watch a particularly nasty strain of the common cold march its way across the Midwest, but the idea becomes vastly more interesting when you start to plot SARS, Avian Flu, West Nile, etc.
Combine News articles and a graphical geological representation of an infections march and I think you might actually have a winner on your hands.
Although, the vast majority of the sites visitors may be hypochondriacs at least you have a good idea who to target your advertising to.
Things like YouTube/Flickr/MySpace influence lives and cultures in significant ways. Those are the kinds of things that make the internet so exciting to me.
If everyone waits to make the next big thing then most of us will be waiting the rest of our lives.
Was that a subtle dig at Buxfer?
I think of Buxfer as intended more for splitting rent/utilities among roommates and tracking personal finances. That seems much less far-fetched.
I.e., visit http://www.nytimes.com/2007/05/10/technology/10pogue-email.html