We are logged into Liferay as administrator. I was able to get Liferay to pick up the Alfresco portlets. The problem, which I've been having over and over again with various version combinations, is that the Alfresco portlets aren't authenticating correctly. I add them to a page in Liferay, the portlet displays, and then they just sit and spin endlessly without throwing an error or actually displaying any data. I know that the usernames are correct, because when Alfresco doesn't find a username, it throws a big error. The really interesting thing is that the next time that I log into Alfresco, I see the page that I should have seen in the portlet.
I'm using Liferay 4.3.6 and Alfresco 2.1.3.