The Mailsack is dead(see edit (ii)), long live the BWU!
There'll be some [url=https://twitter.com/bungie/status/385907459107196928]beta codes[/url] too.
Edit; added twittter link. Edit (II); It seems rumours of the sack's demise were unfounded.
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IT'S THE 4TH DAMN IT! GIMME MAH BETA CODES!