What about Shino's age? Itachi is the newest member of Akatsuki, right? He left Konoha six years before the time jump. Shino was twelve before the time jump, so he would have had to have entered Akatsuki at the age of six or younger.
Conclusion: No.

however, I must admit that Shino does seem to be questioning everyone after their missions. He could be an informant for Akatsuki. If Itachi and Kisame are going to waltz into Konoha after that war with Orochimaru and the sand, they probably want to know the status of everyone's defenses. They could use the help of an informant, and kids are notoriously good informants.

Terra, I agree. Rin would be a fucking awesome member of Akatsuki. What a damn great plot twist.