YC is now the best deal that exists.
Hm. There are folks still using the 'old-fashioned' model of fundraising manually, building a team, honing a product and going to market. YC may be the best deal for a crew of wet-behind-the-ears startup virgins, I'll grant that.
150k is not going to get a company very far, and certainly not far enough to reinvent the startup model completely. Building a team is still a critical part of building a YC (or any other) company, as is honing a product and bringing it to market (which is primarily what they help you do). Saying that those things aren't part of the YC model just because you get some extra free money on great terms is disingenuous.
Also, more and more experienced entrepreneurs are going to YC, because of the effects of the network and because the money really isn't that expensive. People always bring up that it isn't a great deal for experienced entrepreneurs, but you can ask my friend Steve, who just sold Reddit, went back to YC, and just raised a fat series A for hipmunk whether it was worth it.