Ahemm, did I misunderstand something?
The iPad is not locked to a carrier, isn't it?
So why bashing the iPad, because one carrier changes his plans? Can't you simply switch to another carrier?
Here in Europe you can get cheap plans from smaller carriers. Well, their coverage is weaker than that of the main players, but that's simply the reason for the lower price. You have to decide, what is more important for you, good overall coverage or cheap price.
And if really no carrier offers you a comparable plan to what you had at AT&T, then you won't get it with another 3G device either.
So I understand, that you might quit with AT&T, but why getting rid of your iPad ???