Not gonna happen. The question is asked in the petition, "Why do iPhone user doesn't have to pay anything but ipod touch user have to?" The answer is simple, it all comes down to how costs are amortized for a product. In the case of the iPhone, costs are amortized over a 24 month period, therefore new features can be added for free during that time.
For products who do not have their costs amortized, bug fixes and such are fine, but new features are out, or else the accountants and lawyers will have their wrath.
Since the iPod Touch didn't ship with these apps originally, a fee must be paid to gain these new features.
How this fee was arrived at, I have no idea, but I would have to assume that the bean counters somehow calculated development costs and such for these apps, and are charging accordingly.
I found
this link giving similar info, and also specifically mentioning the Apple TV (article is from April '07) that it also has a 24 month amortization.