How much, and what kind of licensing do I need for Office 2010 on RDS?

I need to install Office 2010 on Server 2008 R2 running RDS. Is this what I need?

http://www.provantage.com/~1350348144.htm

There is no media with that, so I don’t know how I get the installer.

There are 35 RDS users, do I need to get a different license for each one? They won’t all be using it at the same time, but there may be 5 people using it at a time. I know that every RDS user needed their own RDS CAL even though they weren’t going to be using it at the same time, so I assume it is the same here. Is that right?