The new eeprom framework should make it pretty easy to add support for DS2431 1-wire eeproms, which I have here on a breadboard.
There is another variant, DS2433, a 4 k version. It is significantly different from the 31 that is need a sample to develop against. This part is obsolete though, so I guess we ignore it for now.
Eta: ah there is a DS24B33! I’ll grab one.
Microchip also has a UNI/IO single wire eeprom, but it seems to use a Manchester encoding like thing. It looks doable, but I’ve never heard of anyone using them.