These are the people with whom I've played. Some are in more than one of these campaigns; I only listed them in one. The links are provided in case anyone wants to check out their style (
stylin'). I did not, contrary to what it looks, list everyone in the campaigns (though I did for some). I also did not mention people already in this campaign, though certainly you all would have made it.

In no particular (game or person) order:
House Millithor: Endur, Pyrex, Xael, Thels
On the Merchant's Road: ToddSchumacher, Kajamba Lion, reapersaurus, Creamsteak, Festy_Dog, Sir Osis of Liver, John Clark, Torillan
Beginning to the End: Mordane76, Majin, Jarval, Velmont, Thanee, Jemal
Silverymoon Campaign: Manzanita, Erekose13
Storms of Change: silentspace, GPEKO, Someone
Lamentation of Lolth: hippocrachus, Chaos Apostate, Isida Kep'Tukari, Brother Shatterstone
Graverended Grimoire: Dalamar, Paxus Asclepius, Uriel, Serpenteye
Gardens & the Graves: hafrogman, Ashy, Lady Shatterstone
Legends of Hawaiki: Argent_Silvermage, Rauth Snowfang, wolff96, Mirth
Clockwork, Steam & Sorcery: loxmyth, Uriel, bruin, Badger
Warcraft D&D: sophist, Robbert Raets, dead_radish, Rayex
Pint Sized Sword & Sorcery: Fieari, Lichtenhart, Vargo
Heroics around Hommlet: MattDroz, WhatKu, mackenson
I would
love to play with anyone from the
Welcome to the Halmae campaign (spyscribe, Fajitas, WisdomLikeSilence, others . .. there's no list that I know if, so it's hard to say), but I've never actually seen any of them PBP.