Thanks for your nice words. Topics with several subjects are hard to answer. I'll try anyhow.
1) I have Communicator working with a standard template and system SEF and mod_rewrite.
?? Do you tried with a standard template ??
?? Do you have other SEF components installed ??
?? Have you checked this
topic. ??
2) Not with V2.0.2. But on the todo list for next Communicator.
3) Logged and subscribed users get the 'Unsubscribe' Button displayed.
4) What you intend it not possible at this time. But each subcribed user should be able to unsubscribe with his email address.
Eric