Wouldn't mind getting my hands on SmartFirmware 1.3.99 20061023163101
Yeah, but please note that firmware isn't like "regular" SW running on top of some abstraction layer (so you can't simply ask "please release the latest version to the public", and trust that some non-existing abstraction layer will tackle any incompatibilities); the firmware is hard-coded to particular HW, the firmware is in fact the particular SW that initiates and brings the particular HW up and running, and on top of that, in SF's case, the ambitions were also bigger than being "just a BIOS". I'm sure that if Genesi/bPlan would have thought it would be a good idea to release that firmware for *your* particular motherboard, they would have done it already!

Speaking of Smart Firmware "version numbers"; the "20061107" was even later, and that in turn was replaced by "20070122". But both these were for the Efika 5k2 motherboard!
