I got my board. It's a great toy, I really enjoy it. First, it works as advertised. To get it up and running connected to Windows took 1 minute, only including installation of USB serial driver which is available on the unit itself on the internal flash drive available as an USB drive.
While program is running, you see an USB drive and an USB serial terminal. No need to download progs, just edit straight on the USB on the host machine, test it via the USB serial terminal, etc. Same with uSD card when inserted, no need to remove and to risk your board. Python 3.4.0 implemented with all hardware related functions including file operations so you have a feeling working on a 'real' machine not on a microcontroller.
BTW, it is an ARM CORTEX-M4 CPU with hardware floating processor, multi-channel DAC/ADC, digital I/O, timers, etc. And with an accelerometer on the board. It is low power consumption, ideal for audio signal processing and for many other projects.
A great little stuff!