I have just found a very good resource about Hekaton (In-memory OLTP feature in the SQL Server 2014).
On the Codeplex site you can find the newest Hekaton samples - https://msftdbprodsamples.codeplex.com/releases/view/114491.
The latest samples we have were related to the CTP2 version but the newest will work with the RTM version.
There are some issues fixed you might find if you tried to run the previous samples on the RTM version:
Update (Apr 28, 2014): Fixed an issue where the isolation level for sample stored procedures demonstrating integrity checks was too low. The transaction isolation level for the following stored procedures was updated: Sales.uspInsertSpecialOfferProductinmem, Sales.uspDeleteSpecialOfferinmem, Production.uspInsertProductinmem, and Production.uspDeleteProductinmem.