These hackers did a few of these with the Treo and a few of them were good, I actually used one of them. I don't remember Palm doing anything in terms of patches or updates to prevent the hacking.
With Apple, it might be a different ball game. They have full control and easy access on all active iPhones through iTunes and I think Apple would not like losing control at all specially with a high profile product and a brand new venture like this. I suspect that the next update will easily disable these hacks to a point. But then again unlocking the iPhone could give Apple additional revenues (AutoXer will be one of them) so they may ignore this activity for a while until AT&T demands the patch to protect its investment