membership/subscription integration

I am looking at subscribe by email as a possible replacement for subscribe2. Two questions:

1) How do you import the subscribe2 subscribers as opposed to the users? The auto-subscribe feature only seems to import users. I realise I could cut and paste email addresses or wave some SQL around but is there a better way of copying?

2) I also have membership installed and of course there are various levels of membership. I would not want a message to go to someone who can't see the post. Since both plugins come from WPMUDEV this should be possible or is it in the pipleline? It is the main reason for installing it over subscribe2 really.