In reply to:
What are the 8 static IP addresses for?
If I'm behind a router, why would I need them.
I generally say if you don't know, you probably don't need them. These addresses are publicly routable, which means if you run a service such as ftp, which anyone on the internet might want to initiate a connection to, then it will be accessible, whereas normally the addresses behind an end user router can only initiate sessions, they cannot be accessed by anyone requesting a session.
=======================================
Everything below the line above is my sig
[Notice: Private mail is turned on, but anything received by these means can and will be published]