Well, first there is the end of Gaara vs. Naruto, the sealing of the arms, and the fight of the Konoha parents yet to see.

Itachi then makes a very brief appearance looking down on the top of the village with Kisame. Kisame asks "Does it make you feel nostalgic, etc. etc." and Itachi replies, "Not at all." No names are mentioned, they have cloaks and hats to conceal them, and the only clue to identity is of course the Sharingan.


Then comes the funeral for the Third.

After THAT, Itachi and Kisame finally run into Asuma and Kurenai, and awesomeness ensues.

So, I'd say 81-82 ish is when Itachi will come in.