A:
I'm not aware of any mice that currently work with the iPad (any generation). I know that most bluetooth keyboards work with the iPad (any generation), but I think the thought process behind now allowing the mouse is that first, there is no pointer on the iPad and that Apple expects you to use the touch features where a mouse would normally be used.
I hope that answers your question... the "answer a question" email was a little vague.
Best Regards!