The 50% off sale goes on until Tuesday, March 8th.
Here are some referral codes, more can probably be found elsewhere in the forums.
Didn't see anything for this when I ran a search, so sorry if it's a repost. Just figured I'd pass this along as it was passed to me.
Note, when purchased, you can either use their downloader and launcher, or download the Global Agenda Demo off of Steam, which is the full client, and use your account from there.
Edited by Caspulex, 06 March 2011 - 07:39 AM.