The GORF-a-thon is no longer just for the glory.
RC2014 is a simple 8 bit Z80 based modular computer originally built to run Microsoft BASIC. It is inspired by the home built computers of the late 70s and computer revolution of the early 80s. It is not a clone of anything specific, but there are suggestions of the ZX81, UK101, S100, Superboard II and Apple I in here. It nominally has 8K ROM, 32K RAM, runs at 7.3728MHz and communicates over serial at 115,200 baud.
The RC2014 Mini is a single board computer which combines the CPU, ROM, RAM, Clock, Serial I/Oand Pi Terminal of the classic modular RC2014 on to a single PCB. Having all the functions on a single board reduces the component count and therefore the amount of soldering compared to the modular equivalent. It also allows more efficient use of the logic chips. This efficiency comes at the expense of upgradability, where the modular option allows for any of the functions to be replaced if required. The likelihood of wanting to swap major components should be weighed up to determine if the modular or the Mini approach is right for you.
Looks pretty awesome!