1 Tail, 2, 4, 5, 6, 8(not yet), 9(Not gonna happen).
I wouldn't say
not gonna happen, but more not gonna happen in the near future. As much as people like the kyuubi, and think that it's an important character in the story, it really isnt if you think about it. There is still a possibility that Naruto WILL have the kyuubi removed, which in turn allows him to discover his kekkei genkai, which the kyuubi may have been suppressing so that naruto wasnt able to control him. (I read a theory/prediction on this from another thread... I think it was on this forum.)
we know nothing of the Uzumaki heritage, only that they were from the former whirlpool country, or whether or not they have a kekkei genkai. This would explain why the first was the only senju that was capable of using elemental combination, because his mother was possibly of Uzumaki lineage. Combined with the Senju's chakra resistance (as shown in naruto and his ability to resist the kyuubi's chakra) makes for a pretty powerful combination. Another example would be Haku, who was
also from the former whirlpool country (coincidence? I think not.), using Hyouton (wind+water) element. So he could have had some Uzumaki blood in him as well. And that would also explain why we know nothing about the uzumaki clan, because they were wiped out because of their kekkei genkai. (the reason the whirlpool country had their war in the first place, to kill off all clans with kekkei genkai. as seen with haku.)
I know this isnt as well explained as it could be, but i'm a bit tired right now. If you would like to look more into that, I implore you to look for that post I mentioned, it was very well researched/thought out.
And I believe we'll see a fight in full transformation before this ever happens, giving kyuubi lovers their fix
Anyways, that's what I think.
Found a link to the theory:
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Which I think is very plausible.
Click the first "spoiler: show" button on the post.