In my opinion, one of the largest hurdles we have is finding a way for rpers of the factions to interact without having to jump through hoops. Interaction in public areas like DS9 is often interrupted and messy. Star bases are good, but isolated to a particular fleet.
Using the DS9 Ready Room from "Second Wave" would be nice.
Actually, the Second already happened. And the problem with that was how that majority of the topics were simply reposts of requests from the First Roundtable. Only myself and a few others had anything new to ask.
I don't know who is in your contacts list, so I cannot speak for them. But I can honestly tell you that I myself was at both Roundtables, and I noticed that 90% of the topics brought up in the second Roundtable were simply repeats of the first Roundtable. I think that is why a third never happened. If a third Roundtable were to happen, it would be nothing more than the same topics over and over and over, like no one paid any attention the first times (so in all honesty, you didn't miss anything). The only real difference was a change of location. The first was held at Risa, and the second was held at Bajor.
Here is the link to the blog stating the exact time and location.