Lots of good replies here already

I didn't realize people would give Ino such a hard time... I don't know what she's thinking, but deciding on killing a former crush isn't easy. Maybe she's got another reason though.
Since things have progressed this far, just "getting Sasuke back" would start a load of problems, mainly with the other villages.
If there is another attempt it will probably the last. Seems Naruto is also sitting on needles and is running out of reasons not to view Sasuke as criminal.
In my opinion that was a slow process but we've only seen a small part of it until now.
Be that as it may knowing Shikamaru's efficiency their team will have a good chance of succeeding.
Sasuke... I'm not sure whether he's got a secret plan or really is like a leaf caught in a current. It seems to be the latter...
I wonder what's going through his mind, with his reckless approach of invading the meeting. Sure, Zetsu's entrance (which was creepy and awesome) and the ensueing chaos might work in his favor but we're talking about 5 Kage and 10 bodyguards... (!)
Lastly... They're running out of trustworthy people at the meeting... Danzou screwed up big-time. Raikage has a secret agenda (actually I'm equally cautious of him and Danzou... Seriously what's with "I won't be part of an alliance which will make me reveal my village's plans!")
While Naruto would be a logical candidate, I doubt he'd be accepted. They're not even acknowledging him, it's just "the Kyuubi belongs to Konoha". Before they see him as more than a weapon, it probably won't happen.
Looks like the only thing that could get them to work together is a direct attack by Akatsuki..