Gavagai - Very good questions. The PCs will probably be physically separate but be able to contact each other any time though a psionic version of the internet. Gameplay will probably center around maintaining and expanding one's personal base of power while other PCs and NPCs jockey for leverage over each other. I'll get back to you with more detail and a response on servitors.
Avalon® - Yes any alignment. Also if your character's outlook is too complex to fit into any one alignment pidgeonhole that's even better.
Shayuri - Fey warlock is fine, 20th.