I'd be interested in being a god in the forums, seeing as I'm already one in real life.
I'd make good god material: I've been known to act sporatically, have my own agenda, possess a touch of megolomania, and all those other things useful in a forum god but not anywhere else.
I was thinking of using my forum name as it's actually based on a powerful being from Sonic comics, from the absolute beginning of the Knuckles comics (issues 1-3), and I plan on playing my god in a similar way.
As for religious spheres, I'll take Technology and Lightning, and will usually influence the civilizations via these means.
For those species which desire my favor, I'll let them decide how they communicate with me (like oracles, or priests, or mass meditation, or other ways), and sometimes use those methods to respond or help.
Example: One species communicates via an oracle that they're being killed off by stronger neighbors. So, I might give the oracle a fey mood, send the oracle off to create a weapon previously unknown, and announce that the civilization know possesses knowledge of creating said weapon, complements of me.
As a god, I encourage growth mainly by technology as opposed to biological evolution, magic, or perfection of natural abilities. Of course, some biological growth is important to gain a better understanding of technology, and I won't be turning away any true believers. If I was to be the god of one of the Master of Orion civilizations, I would chose Meklars, Psions, and Humans, in that order.
Of course, everything I say is dependent on what the REAL boss says. I hope I can be of use to the pawns, errr species.