Interesting, the metaphor of the guild, but it turns us into medieval craftsmen working in a specific trade that has been handed down through the years. The term implies we would all do the same kinds of things, and innovation would mostly involve minor tweaks to our practice.
I think Scope is a broader church, a looser constellation of interests than the term "guild" implies. Many of us are not "tradesmen" or "craftsmen", we may be more analagous to "monks", if we want to use the medieval frame a little longer. But I don't think we are medieval, we may have shared interests in similar practices, but our "trade" is emerging as we go along. Guilds existed to protect a particular way of doing things, a shared and largely structured and homogenised practice. Scope exists to explore different ways of doing things, and extend our understandings.
Another key element to me is that guilds were always closed organisations. There were barriers to entry, someone had to apprentice you into the trade. Now you would pay, as you have to if you want to be fully involved in the e-learning guild. Scope isnt that. And I think it continues to be fascinating as you say because it is open.
"Open, Online Community" (interesting initials!!!) is what it says at the top of the page right now. I think that works just fine. Why fix something that isnt broken?