A) Well, I don't think you can take Skald levels without Bardsong. So, no, that wouldn't work. But Fighter, Weaponmaster, Duelist would. (As an aside, that would be SICKENINGLY powerful at high-high levels.)
B) A PLAYER can be a part of a theoretically unlimited number of organizations. There's a realistic limit around 18, but...
- Player Bob can NEVER have more than one character in the same Organization.
-Character Jane might be in several Organizations, provided those Organizations are not in competition with each other (i.e. an exploring guild and a trading guild would be okay, but not two trading guilds).
C) As per
the min/maxing rules you could have a character with an ability score under 8 - just not more than one, and not more than two under 9. Do remember that you will have to play all aspects of a given ability, though. Ugliness isn't all Charisma's about, for example.
D) You cannot have multiple deities in your deity field. It just doesn't work. You'll show up (in the code's eyes) as an invalid deity, and will be considered Neutral to everyone.