Pinocchio's not a puppet he's a real boy.
Sorry, just had to get that out of me.
As for Tartaglia as Gingy its a no go. According to Haven's myspace she says that she will be playing a cookie this fall in Shrek.
I can see Tartaglia playing Pinocchio. And, I can see Pinocchio being done either full body a la Timone in The Lion King or as a hand puppet a la Avenue Q. Either way, considering how good a puppeteer Tartaglia is I am sure he would have no problem however it is set up. Keep in mind, that in Lion King they have to train whoever is playing Timone on how to use the puppet. If Tartaglia is in the show he might not need as much training if at all.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll