Today we added blinky example to the SDK. It assumes that board is pre-programmed with SoftDevice and Bootloader. If you do not have such, you need to change memory areas as follows IROM1 start 0x0, size 0x40000, IRAM1 start 0x20000000, size 0x4000 for 256k chip.
Now, it is possible to upload custom code using on BLE DEV.N board USB-Serial connection. This will remove the need of owning a programmer (which are quite expensive). I think it will make happy all the hobbits who does not have bugged to buy, but have the passion to explore magic of the Bluetooth Low Energy (BLE) and do nice gadgets talking with their smart phones.
Here is the detailed document BLE DEV.N DFU v1.0