I suppose one could make the argument that people should be disappointed in this, but its not a strong one. The more and more I read this thread the more it seems that people were planning on buying a machine based mostly on what they were going to get free (i.e. the "I'm not buying a Mac now because I only get a $100 Gift Card and not an iPod") and not based on their need for a new machine. Fact still stands that Apple and frankly any other company don't need to do this. You think no one buys Macs throughout the year because everyone is waiting until Summer so they can get their free iPod? No. This is a promotion... they do this to PROMOTE their brand and try and get people to switch. And chances are, if you have a Mac already, you're not going anywhere. Apple knows this.
Point is you can be disappointed, or upset, angry, whatever you want if you were deprived of something that was owed to you, but this isn't a mandatory thing. I personally need a new machine and did wait to see what they were going to offer for the B2S promotion, but you know what? If they didn't have the promotion I would still be getting a new machine because I need it. Not because I need a new iPod. So I'm personally happy I got something ON TOP of the discount they're already giving me for being a student. Beggars can't be choosers. Be happy you get something of value for free.