Ok � a little puzzle:

I�ll take the dog for a walk.

Me, too.

Does this mean:

a.        I�ll take the dog for a walk as well

Or

b.       Take me, too, for a walk?

Whilst most people would go for a, I have to select b and stand by my remark that �Me too� is grammatically inaccurate. It is undoubtedly now so common in speech that it has become idiomatic, but it is incorrect in formal writing.  Think of it as in this example:

I want to go to Australia.

Me, too. i.e. Me (too) wants to go to Australia.

Sorry I haven�t got my Swan to hand to check.

By the way, I say �Me, too,� all the time!

Hope this helps.