The black flame is not ama-chamacallit.
From what I remember, it sounded as if isami wanted itachi to go somewhere for ama-chamacallit to "awaken"? Maybe it's also a hidden demon? =P. Naruto's beginning to sound like power rangers. (turbo rangers rule!).

anyways.

Tsukiyomi is no doubt Itachi's genjutsu.
The black flame is likely to be itachi's ninjutsu - as all the Uchiha's possessed this elemental power.
I think Amaterasu would be a suped up version of the Tsukiyomi genjutsu (perhaps during a full moon)? During the flashbacks of Itachi slayment (this a word?) of the villagers, anyone take notice of the shape of the moon?

It doesn't have to be taijutsu. Hand-to-hand combat is not supreme. I think there's an odd fascination with it because of gimps like Rock Lee. Would you really need Taijutsu if you can disable your opponents by looking at them? And if we take a look at the closest relative of Itachi to make guesswork at his abilities, Sasuke has shown no real Taijutsu prowess (stealing Rock's moves isn't spectacular).

Well that's my two cents for now.