I just got off of the phone with them. They were really helpful and I have to admit that I was surprised at how nice they were.
What they are going to do is that everyone who got in on this will get $20 off a new order of anything. The rep implied that this will come to anyone who ordered, regardless of whether they contact Gamestop or not, but I would at the very least shoot off an email to them asking about the error to make sure you get it.
Additionally, if you want to return the item, they will ship it back to them, but you do have to contact them for an RMA and their FedEx shipping number.
For those who are really interested in the pro unit, they do have it available for $79.99
here.
With a return of the other unit and the $20 coupon, you are talking about $35+tax (and maybe shipping, I am not sure whether you can combine codes) for the pro unit that does optical switching and has inputs for 7 devices instead of 4.
Again, I have to give Kudos to Gamestop for not pulling some of the crap that other retailers pull when they make mistakes like this. All they "had" to do was accept back the mislabeled units, but they have gone an extra mile and given us something as well.
I am not sure what I personally am going to do, so I'd like to hear what others think about it. Thanks!