[dmurray]

> At that point, the patent has given you no advantage in implementation over the simple knowledge that a process for doing X exists at all.

This depends on whether you consider X to be "converting ecommerce sales" or "ordering items with a single click". Just because the implementation is easy to reverse engineer from a one line description of the novelty doesn't diminish the resources spent by Amazon in coming up with this insight and testing how it improved their business.

I'm not strongly in favour of software patents in general, but the argument that this patent is "too easy to copy" misses the point a bit.