@Kietl: That sounds like a good deal, but I'm not sure how that would work. Do you mean just throwing in random bits of grammar plus some words whenever you need them and expect everyone else to use them?
Not sure if that will work on a forum. IRL, maybe, though. Or maybe an IRC channel.
Well, obviously there would have to be some "rules" governing how things are suggested. I think that we had a pretty good system back on the old forum: if someone has an idea--whether it be grammatical, phonological, orthographic, whatever--they can formulate it into a suggestion and explain it thoroughly to others. People can try it out, decide if they like it or not, suggest other alterations (limitations or expansions), etc.. Eventually the suggestion may become an integral part of the conlang.
The only limit, I suppose, would be to avoid suggestions that radically
alter what is already "decided" or universally
shift something throughout the whole conlang. If someone wants to effect a radical change of some kind they should go about it in a gradual
manner--just like changes in any natural language.
So, pretty much, I'm not really in favor of limiting the discussion/creation of Omni to one specific subject and then trying to set up a voting process in some rigid, systematic way. Just let it grow out of what we already have--if the majority of people don't like it now, they are free to change it gradually into what they want.