Heh. Siege was my first MP gamemode to play... I still remember the days when tempest was full nearly 24/7 and had a competitor, the <GoS> server. And that was back in 2009/2010... Weird that pop dropped so much in a few years.
http://www.playigl.com/ So, what are you thinking about that? They'll have JKA, which hopefully will increase the population. Most info is on facebook.