"My impression is that the big stink is that Apple lied to their third-party vendors and under-cut them, not that they did anything illegal. Am I right?"
I, too, am not an attorney, so I can't answer the question as to whether Apple has done anything illegal. I suspect they did and will get away with it, as Micro$oft continues to, even after judgements are tallied against them.
The more troublesome issue is that Apple has blatantly lied to their stockholders and to Wallstreet. The SEC might find this more troublesome than not. As for bad publicity, the cost will be hard to estimate.
Thinksecret's pension for giving a voice to reseller issues has not gone unnoticed by me either. I believe it has much more to do with the nature of the battle--the little guys vs. the Big Corporation--rather than Nick de Plume being a third party vendor.
Thinksecret seems to be ballsy enough to give a voice to what, otherwise, would be an unheard message. That's my read on it anyway.
Last point I am wondering about---if Apple is successful and eliminates all third party vendors, will they start screwing with us next? Already, I am becoming more skeptical in dealing with Apple corporate. Look at the iPod battery issue, for one. Apple made changes ONLY after class action suits were filed. Same deal with the powerbook video problems as well as the iBook logic board difficulties.