If you search around the communities - there's an STM32duino forum where the EagleCAD design files for #myStorm have been placed http://www.stm32duino.com/viewtopic.php?f=19&t=1276#p16407

It looks like they have 512K bytes of 10nS SRAM on the back of the board - but it's neat how the $5 Rapberry Pi-Zero plugs in at one end - some cool overall pics on Twitter if you search #myStorm

Suggesting someone search Twitter for a hashtag is not really good documentation. Maybe a link to a top level project page somewhere would be helpful.

I have been wanting to build a smaller project around an fpga so I am very excited about this, if they plan to sell it.