I run a Halo Info website, and like to give the Facts to my Friends on XBL.
According to this site BNet, you simply need a Copy of ODST to get a Beta Code.
However according to a Friend he found out from a Xbox.com Video that you need to Pre-Order the Game to get it.
So if anyone can supply a solid source that says which is correct, Thanks.
-
Well it is a good thing I will be pre-ordering the limited edition.