It contains a 120GB Xbox 360 Elite, controller (curiously, not an ODST controller), a copy of Halo 3: ODST, a copy of Halo 3 and access to the Halo: Reach beta.

http://kotaku.com/5360626/halo-3-odst-gets-a-360-bundle

I thought all ODST games come with a beta code for Reach.

I thought all ODST games come with a beta code for Reach.

Yes they do.