Dave Curran blogged about his Arduino based programmer for the DivMMC future:
With the labels on, it may make more sense. This is a programmer and tester.
And that is what it programs and tests, the new DivMMC Future from The Future Was 8 Bit. With lots of orders for this coming it, programming each one individually takes a long time, so this will automate this process and program 4 units in parallel. Not directly, but via a number of remote controlled ZX Spectrums.
More details at Tynemouth Software blog.