Is there support specific for external eeprom ? What other non-volatile memory features are available ?
We have used many through the years. They are usually easy to implement. Are you thinking i2c eeprom or spi dataflash?
Probably I2C. Is there a plan to implement a package to access it. Or should I do my own driver ?
I know I promised not to link to old website but there are many examples here http://old.ghielectronics.com/community/codeshare/search?q=Eeprom
Of course we now should turn this into a NuGet and make for TinyCLR. I would love to help you with all this.