Is ND+2 base firmware based on Oberon porting for STM32F4 microcontroller?
Netduino Plus 2 firmware uses a port created by KodeDaemon, with contributions by CW2 and the Secret Labs team. It's based on the earlier STM32F1 porting work done by the Oberon team, although we're working to merge in some of the STM32F4 port to get the best of all worlds and would like to give Oberon credit for all their work there too. Thank you to all of them.
What about file-system support?
FAT/FAT32 is built in, for the MicroSD card. It should be identical to Netduino Plus 1...but may be faster
Did you ever run some performance comparison with competitors boards?
Performance is likely to be comparable with other STM32F4 ports. We're compiling with RVDS, so the code should perform well. We may be able to tweak NETMF to take better advantage of the awesome integrated floating point unit as well, as time goes on. So many possibilities.
We just tried to purchase a couple of boards in EU, but distributor still has 0 in stock: do you know when they'll be refurnished?
We're trying really hard to get as many units out to resellers as possible, as quickly as possible. The best info will come from the distributors themselves, as they understand their order volumes best.