No, I really think its intentional. Molly Wood from the Buzz out load podcast was going OFF on Apple lately (so much I may have dropped them as a podcast), and I'm sitting back thinking... yeah, Apple doesn't really have a choice. Ringtones are considered a different "right", and they have to acquire and pay for those separately. But, once they put the provision into the system, there is NOTHING to stop you from creating your OWN ringtones and managing them through iTunes, just like you do with audiobooks. Makes sense. I don't think its going anywhere.
My assumption with iToner up to this point, was that Ambrosia had discovered the internal controls for allowing iTunes to sync ringtones using Applescript or something, and that they were doing this in the background. Whether or not this was true, I'd only starting thinking about a cross-platform implementation of these "hooks" I thought were there, when I thought to check my Windows filetype list, and there it was. I knew it'd have its own extension in iTunes.
There's NOTHING that says Apple can't allow users to take advantage of the hooks in their system, so long as Apple is responsible for them actually doing it. Nice job.
Good on ya Apple!
~ CB