I noticed this subject in the Coda area, and wondered how the population for this forum have adapted/changed the LUG rules for their own purposes. Hand-to-hand scraps are an enduring staple of our games - if the episode ends without beats being laid, there's something really wrong here - and the quality of such situations counts for a great deal with the game's final grade.
The rough and unfinished unarmed combat stuff in Coda was one of the foremost reasons my Crew and I decided to (largely) chuck that system, but we've ended up making a few adjustments for Icon as well. Our biggest change is that we've substituted the base damage for an attack (2 for punch, 3 for kick, and so on) with the character's Fitness level, plus Strength edge, plus whatever bonuses the technique carries: we thought it a trifle ludicrous that someone with a Fitness 1, Strength +2 can do more damage on a straight punch than someone with an unadulterated Fitness 5.
Another rule of thumb is that the Difficulty level is based on the straight punch - 6 - with no modifiers. A kick, at Difficulty 7, carries one (1) extra point of damage. Thus, generally, the higher Difficulty the technique carries, the greater proportional damage it will do. Add-ons (stun, etc.) may add Difficulty.
So, what homebrew rules has the rest of the population here come up with?