The package is released as a full install and a update in one.

So you can use this package to upgrade your current LC 2.0 install our to do a fresh install from scratch.

Most important for the people already aware with Connections and waiting
to press that update button for this 2.0.1 upgrade is the question what has changed!

Luis Benitez has summed op some issues that have been fixed and new things that have been added

http://www.lbenitez.com/2008/11/lotus-connections-v201-is-here.html

Mitch Cohen also did some posting about the new 2.0.1 release, he is mentioning
one of the new features, QuickR integration.

For now this feature will only work with the quickR J2EE version, integration with the Domino QuickR version will come at a later point in time.

http://www.curiousmitch.com/CuriousMitch/mitch2.nsf/d6plinks/MCON-7KWRGK

IBM already updated their info center with all the facts about installing and upgrading LC 2.0.1.

http://publib.boulder.ibm.com/infocenter/ltscnnct/v2r0/index.jsp

Here is the download document for 2.0.1.

http://www-01.ibm.com/support/docview.wss?uid=swg24020963

Below the URL with the system requirements for Lotus Connections 2.0.1, one of the reqs that has changed ( and for what I have read the only thing ) is that your DB2 setup should be up to fixpack level 5.

http://www-01.ibm.com/support/docview.wss?&uid=swg27013762

Below are the steps that I took to upgrade our current DB2 9 fp 4 setup to level 5.

install-db2-9-fp5-linux