I play Diplomacy as "BlazeNixon", and have recently got an excellent computer so I can get back into Sins.
I use the most recent version of Diplomacy, which at the time of this writing I believe is 1.2?
I also use the Distant Stars mod if others have it, since it literally doubles if not triples what the game has to offer in terms of planets, capture-able objects, research, etc. I'm fine with playing the regular Diplomacy, though I would HIGHLY recommend you get Distant Stars-it is an excellent way to improve your gaming experience if you love Sins as much as I do!
I play generally from 6pm EST onward, and for now I'm looking to play against Hard/Cruel/Unfair AI with people, or a group of other players that are in it for the long haul as well. Games generally last a long time with the right settings!
Speeds would be "fast" for everything but diplo, which I usually have set on 'Normal". I find that's a pace which isn't too slow, but at the same time isn't insanely fast either.
I'll keep an eye on this thread, but don't be afraid to find me in game!