My simple solution on the iPad has been to install the Google Search application and get my wife to use that for web browsing and email. That way she gets her o

My simple solution on the iPad has been to install the Google Search application and get my wife to use that for web browsing and email. That way she gets her own set of cookies so she can sign in to things separately from me (I use Safari), plus she can access gmail through it as well. It even works well for her way of using the internet, which pretty much always starts off with a Google search. I thought the lack of user accounts would be a problem before I bought the iPad, but in practice this has been good enough and much less of an administrative overhead than proper user accounts would probably be.