I'm due to get the production run of TinyFPGA B2 boards delivered in the next few days.  There's a bit of work left to do for the B-series boards in terms of fixing some bugs in the USB device and building a pogo tester/programmer.  I've started a dedicated project page for the B-series to log progress: https://hackaday.io/project/26848-tinyfpga-b-series

A picture of a panel I received from the assembly house:

And an x-ray image of the BGA package (with 0.4mm pitch!):