I probably wouldn't buy an errata deck. I'm already stretching to afford this game (don't get me wrong, it's worth it, but that doesn't change my financial situation). I'm perfectly capable of remembering the errata from the faq and I don't really have a problem relating that information to newcomers. As you say, Vic, most of the changes have no effect on gameplay. I just can't justify the cost for the handful of cards that are affected.
I don't sleeve my cards but I would happily accept the PDF solution. It's not that I would print them out, it's that a PDF would provide a superior visual reference to errata than a simple faq. But that's such a minor thing that I'm not certain it's worth the effort on your end, using the valuable time of those three employees. But if your determined to see it through, I will tell you that I'd very likely be willing to pitch in a dollar for the PDF, to help recoup the costs in man hours.
As an additional thought, I'd probably prefer seeing a PDF because they are easily alterable. As you say, there will *always* be errata. You might need to errata the errata. Then you'd have to wait for those subsequent changes to stack up and create another deck to fix the first one. That's a lot of trouble, both for you and us, to go through for something so intensely minor.
But that's just the way I see it. Most of the folks I talk to would prefer to pay out to have their cards *just so*. So probably both is the best option, based on my very, very, limited understanding.