Need help with features mentioned in the description

Dear WPMUers,

I currently have difficulties to find the following features that are mentioned on the plugin page:

Promote your brand by adding links and images to your social network profiles
Registration and subscription management widget
Manage your member lists by interest or anything ya like to better target your messages

I assume that I am looking in the wrong section in my WP dashboard. However, I do not see how the above "promote your brand..:" can be achieved except classic linking with HTML?

I also do not know what is meant by registration and subscription management widget???

How can I order member lists by interest?

Besides that I'd like to know if there's a chance to add names (e. g. some personalized greeting like "Hey, John..:") or other custom variables to the newsletter?

Hopefully this is not too many questions...

Thanks in advance,