1. Usually a thread is started for the game in the multiplayer subforum on one of the forums. You have a multiplayer subforum here, and also at
dom3mods and
Desura. There are some other smaller communities as well, but those 3 are the largest. the IRC channel #dominions at irc.gamesurge.net is a good place to get quick answers and play blitz games and duels.
2. Only the magic levels bought originally when designing your god counts towards bless. So you'll always have the same bless the entire game regardless what happens to your god either way.
3. Units with no special reinvigoration abilities, items or spell effects only reinvigorate when doing nothing during their combat turn, and then they reinvigorate 10 fatigue. This typically only happens when they are above 100 fatigue, and does nothing because they are unconscious. Keeping fatigue down with reinvigorating items, earth bless and spells is a key skill in multiplayer, especially for thugs and SCs.
i don't have time to answer question 4 now.