Hey guys, got some Warframe beta codes for you:

36A0-390B-58E6-F14A
85CF-7E54-24F7-FIDD
DD27-A316-605C-0A65

After getting your key, go to www.warframe.com/signup to create an account.
Check your email, Warframe will send you an email with a link that will authenticate your account and bring you to the Beta Activation Page.

Enjoy!