The Minimum Viable Product Dissected
w2lessons.com
w2lessons.com
Here's why I think that is going too far: Who wants to sign up for a screenshot that does nothing, shows not much, and is basically just a bunch of copy and hype? Unless TC or Mashable, or some other BIG site goes and promotes it few if any will actually divulge their info.
What I would suggest is at least an interactive prototype (if only a demo with pre-populated data). They use the example of Twitter... but who would have given their info to Twitter without seeing it in action first? And then, I wager, only the very earliest of adopters would.
The world is full of once over-hyped empty promises. Without a V and a P I think you're wasting your (and everyone else's) time.
Also, the post does actually suggest a static prototype as one of the options.