YC also has the benefit of a large (and pretty successful) alumni network, and a lot of the YC people I've seen talking/writing about their YC experiences have listed that as a huge positive.
edit: Nothing's stopping you from applying to YC too, but the original question was whether or not this invalidates the YC model, and this is why it doesn't.
That, and bigger investors have more at stake, so it is in their own interest to see you do things right quickly.
There are plenty of people that can mentor but they may not be in a position to fund for a variety of reasons (for instance not being an 'accredited investor'). Like this you could actually hire them to give their advice, rather then to come to them for both money and advice, as well as a network.
So kickstarter may very well spell the end of the incubator, but via a completely different route.
Companies like YC thrive on the scarcity of the combination of people with the money to invest and the time to mentor.
If Diaspora fails the model will likely collapse though, they're a poster child for this model now, they had better succeed or die (figuratively speaking of course) trying.
No going back for them.
edit: and don't underestimate the power of being 'YC funded' for follow up rounds.
YC is a great way to kick your startup into high gear as well.
But that's where the similarities end.
They are not substitutes for one another. YC is also not a company. It is a pre-seed stage venture firm (with amazing advice from PG, Jessica and co) and a network of entrepreneurs who help each other.
Of course it should be obvious that kickstarter has zero influence on the success or failure of the companies that people pledge to, but I think if a large number of people pledge and see their money go to waste that it will be associated with the model rather than with that particular company.
Time will tell.
edit: I could probably agree that if Diaspora totally fails, Kickstarter won't be seen as having much cred in Silicon Valley. Mostly I guess my point is that whether Kickstarter has viability as an alternative funding model for films, novels, music, or indie games (the areas it's been most focused on) is a question that won't be much influenced by Diaspora's success/failure.
Interesting figures. I think if this keeps up at all like it is doing now it will be the largest project by tomorrow evening.
I'll be watching closely, but now I have to get some z's (3:30 am here). Thanks for the exchange!
YCombinator's value isn't the money, it's the vast network of connections and deep experience they can provide.
Losing sight of the fact that someone has to actually make money from these things at some point is precisely what gives you internet bubbles. From everything I've read about YC it's all about focusing down to build something that someone wants to buy. That's a world away from accepting donations from people who think something cool might come of it.
There's also the question of whether or not they'll know how to most effectively use that funding. Consultation from experienced people like those at YC would help there too.
Diaspora is an edge case. All the press they've gotten have catapulted their popularity enough to raise this amount. And more power to them too; they have a valiant goal and I hope they can execute on it well.
But I wouldn't try to raise funding for a for-profit startup through crowd funding, unless perhaps your startup has an apparent, believable, and widely-desired benefit to society. I'd love to be proven wrong, but this argument only has a sample size of 1 so far.
Are there already sites that take pledges for software projects (successfully; I think there have been failed attempts)?