A post-Craigslist NYC?

The folks at real estate blog theapplepeeled.com wonder if New Yorkers have outgrown craigslist. A google search of the phrase "sick of craigslist" brings up hundreds of rants, and even an eponymous blog (albeit with a single entry - sometimes the rage subsides).

We're wondering if a new model is due. In an intensely networked world, does craigslist even make sense as a marketplace for real estate? And if something were to take its place, what might it look like?