IGN just published an article which more or less finalizes the contents of ME3's collector's edition. Nothing much has changed in terms of the contents but a few adjustments, though they've posted a video detailing the various features via a Gamestop link. I won't delve into the details here due to spoilers inherent in the video, but feel free to check it out.

Update #1: Here's the direct Gamestop link to the site's video.

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