Hi and welcome to Forum64, home of the MEGA65 !
you will get the mainboard completely populated same as the keyboard. So no soldering needed.
So all you have to do, is build the case together, screw the mainboard, the discdrive and the keyboard into it.
put the SD-card in and you're ready to go.
And if you want to stay up-to-date with information like release, preorder etc. you are here at the exact right place !
We are planning on selling the DevKit in 2020.
For more information about the project you can also visit the links in my signature.
So stay tuned...