As the 4th person to join XMarks, I've seen it grow from its infancy to the dominant gathering place for kilted folks around the world.
I think this is due to the daily life stories told, the kiltmaking attempts of non-kiltmakers, the history discussed, and most importantly, the everyday participation of kiltmakers, either through sponsorship, posts, or helping would-be kiltmakers.
Let's not forget Hank and the Mods. They do a tough job balancing free posting and anarchy. Well done, lads!