I currently have several campaigns set in Neng, although they have varying degrees of frequency.
Russell has a two characters Carlys eal Tharstorr and Salaomer ein Ringoral (who drop in on the other campaigns when he’s available generally once or twice a year); when one of us visits the other, we usually get in a solo adventure for one of them.
The Rose Tower campaign is the one that my Sunday group played for about two years, before we decided to put in on hiatus. One of our players (Rob Barrett) left, and three new ones joined (Scott Oser, Rachel Hartmann, and Mike DeSanto) and there seemed to me to be a real divide between the characters who had been adventuring together all along and the new characters; the campaign was big on politics and continuity with past events, and the newer characters tended to not have the ties that the others did and the players tended not to know what was going on unless someone stopped and explained it to them frequently. I thought it would be best to start everyone with new characters, at least until the new players got “caught up” enough on world events and developed enough of a backstory not to be put in the shade by the established characters.
The Rambling Bumblers campaign was the result of the decision I mentioned; the characters all started as students attending the same boarding school in Neng, although they were free to leave and adventure after that. The Rambling Bumblers was the name the group gave to itself after its first couple of adventures in alternate dimensions led to horrible, horrible things happening in those dimensions. I had meant for the dimension hopping to be a short diversion, and give all the players an equal footing as far as knowing the history of the place; in retrospect, it was a mistake, and afterwards they never really fit into the Neng setting, plus they developed a bad habit of running away from any trouble they stirred up–generally to a new dimension. They are currently semi-stranded in the Spice Islands, far to the south of Neng proper, and since Rachel and Scott are leaving for Canada at the end of the summer, if we continue with Neng we may revert to the Rose Tower campaign.