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.tsnavi files: hack or useful tool?

Hi all,
I've noticed in the recent FireWire SDK 2.0 the presence of the transport stream navigation files (a.k.a. .tsnavi): as they seem a good idea when manipulating the otherwise convoluted (to say the least) HD streams, I wanted to ask a couple of questions about.

- Are they a temporary/experimental hack for the AVCServices framework, with no utility in the real world, or a foundation for something that can be used, now or in the near future, as a standard reference for programs (FCP or iMovie come to mind, of course) that wants to manipulate HD streams?
- If the latter is true, I've noticed that they're based on a straightforward binary format: what will happen when, with the new Intel-based Macs, the endianity will change?
- If they're a clever hack instead, is anyone aware of a (present or future) standard for the indexing function they provide, considering that they're extremely cheap to create and handle?

I'm sorry if the question has already been posted, but I wasn't able to find any references in the list's archives...

Regards
Paolo



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