If I understand correctly, the number of node events for each keyword is as such at the point I pulled the timeline off the server (a few minutes ago):
13: Italy
7: Bruno
6: Christianity, Marcello
5: Blognomic, Katastrophe, Keitalia
4: aran, God, Literature, Martial Arts, Math, Nietzche, Philosophy
3: Anomalous, Arbiter, Blood, Dinosaurs, The Lone Amigo, Lyndse
2: Archimedes, Bible, Bucky, Chicken, Elias IX, Empire, Greece, Jesus, Meteo, Millennium, Perilous, Red, Silk, Thelonious, Tornadoes, Towel
1: Chronos Phaenon, Disaster, Death: Elias IX, Gandhi, Greth, Hix, Init, India, Kevan, Linguistics, Reunion, Rose, TIME BOMB, Viking
Observation: The rules state that a new Traveller may not chose an existing keyword as eir name, but the rules also state that when you sign up to become a Traveller, you do not become one until -after- you choose a name (unless I misread). (I realize the spirit of the rule is that you can’t make a traveller with an existing keyword, say, Bucky in this case, and declare victory, and even if you could it could be voted against as a scam.)
Anyhow, out of active Travellers, Aran appears to be closest to having 7 node entries, with 4.