Just got the same email here they are:
YYZD-YBJD-WK2R-JFQQ
YYZD-YF3X-BPZY-JPD4
DEED-W3ZW-P84W-MMYW
DEED-W8ND-4C34-HK8N
DEED-XC7X-KH3C-R47C
HOW TO REDEEM YOUR BETA KEY:
GO TO HTTP://APPS.FACEBOOK.COM/DRAGONAGELEGENDS/
INSTALL THE FACEBOOK APPLICATION
LOGIN OR CREATE AN EA ACCOUNT ENTER...
Just to let everyone know this website is giving out 500 Rift Beta Keys!
The codes are all posted on the page so you don't have to sign up or anything if you don't want.
Hurry before they are all gone.
http://gamrfeed.vgchartz.com/story/82771/giveaway-rift-beta-keys/