Ask HN: How did Hipmunk integrate AirBnB rentals?

It would seem that they know each other:

http://blog.hipmunk.com/post/6493889280/your-guide-to-a-priv... http://blog.airbnb.com/your-own-private-island-from-airbnb-h...

Same way other (orbitz, kayak etc) do it. There is very little money in airline ticket sale cuts. A much bigger market and ultimately how these companies make a majority of their money is thru hotels.

They are both YC companies so I am pretty sure they know each other.