I have populated the newer v1.0a board which has latched strobes on the access LEDs.  It really depends on the LED but with a 100 ohm current limiting resistor general sequential access provides a nice flicker for the LED and full on fill or copy of the memory block provides a full-on glowing LED status.  I am sure it could be further improved but all-in-all the LEDs are just useful enough to bother populating but not so useful enough to that I want more of them.  The selection issues that were there when lots of 'don't cares' were in the address selection mask are now gone and the LED only flickers when that specific address block is being accessed.

I have toyed with the idea of adding a monostable that will keep the LED on for the full duration of the memory access, but i kind of like the varying levels of 'flickerness' that gives and indication as to the frequency of access.

I am calling the memory board at a stopping point so have uploaded the user's manual, BOM, and build files to the sbc-85 project website.