You can design your own custom boards for the Edison module, and make your prototypes and commercial products with no problems. I recommend you to check the Edison FAQ about this topic in the following site: Frequently Asked Questions for Intel® Edison Development Boards and...
SpiderKenny, there aren't plans to change the Edison in the near future.
>should I take the schematic of edison and embed that into the main board of the product?
Where did you get the schematic of the Edison module to copy it into your product?
Even if you had it, you would have to make a 6-8 layer pcb and ask an advanced manufacturing facility to place and solder all tiny bga chips. That will cost $$$.
You probably think about copying the mini breakout board.
The only crucial thing is a power supply for the Edison module, only 1 voltage. Then the Edison module will provide 3.3V and 1.8V. Select a power chip that is most suitable for your product.
The Serial<->USB chip connection is nice to have on board, but the FTDI chip FT232R costs $3-4. You may just need a breakout board with it for the initial configuration.
If Intel changes the Edison module, it would be nice if it'll keep the socket.
>Where did you get the schematic of the Edison module to copy it into your product?
I don't! But I'm certain that Intel will have Atom reference designs available for commercial users.
My client would not wish to buy, say, 2000 edison boards up-front. So we'd need to be sure of long term (2 years+) availability before committing to manufacture.
It might be more commercially viable to get a reference design from intel and embed Atom instead, (BGA is no problem). However Edison is a great way to prototype such a product.
Your numbers are minuscule for big discounts. You'll be buying Atom processors like x5-Z8300 for $20-30.
The Edison module integrates the Atom processor, RAM, flash, Wi-Fi, power supply for $50. You just add a connector and space for the Edison module on your pcb.
In a couple years, the Edison may be replaced by a more powerful thing. Then you just redo the interface to a new connector.
Believe it or not, but there are a lot of high valued products out there that sell only in 1000's over the life time (5-10 years). Hint: industrial automation.
However respinning a board design and for instance obtaining certain product certification for the revised board (and not to mention software modification) may easily cost $50000. When the initial design was good enough, there is no value in upgrading to a 'more powerful' processor and it only costs.
Long term availability is key, or alternatively a smooth upgrade path, in this case minimally the Edison form factor, connector and voltage levels should not change for a 10 year period or so.
Vincenze said "Why would a user buy your client's product with the outdated Edison I when the Edison II with twice as much memory, etc will be available?"
The end user doesn't know what's inside my product.
Do you care what processor is inside, say for example, your washing machine? Does it matter if there is a newer version of that processor? NO! Of course not! It only matters that it works as specified!
(My product is not anything like a washing machine, just using it as a vanilla example).
FerryT Understands the situation, and also understands why as a designer we need to know about long term availability.