That's normal, they had a problem with the codes not appearing in the mail. Yes, but the code WAS in the source code of the mail, and now That's interresting! =D You want to find it and play? Simple;
**Gmail: you simply left-click the drop-down arrow a the upper right corner (next to "reply") and select, "view original" to see the source code.
And you'll see: "Use your voucher to enlist in the fun:
XXXX-XXXX-XXXX" (the Xs represent the real code)
**Hotmail: Click the drop-down menu (next to "reply") and select "view message source". Scroll down you'll find the same thing we saw with GMAIL.
And that's it, download your LBP2 Beta right now!!! =D