Liferay could auto deploy portlets that are bundled as EAR just like happens with portlets in WAR files.
I've been using Liferay for a long time, and I always lacked auto deployment of portlets that are deployed as part of EAR files (portlet WARs inside EARs along with EJB modules etc).
Now that we have JEE6, this requirement is even more relevant because of the great built-in features that eases portlet development (CDI, JSF2, JPA2, JAX-WS, JAX-RS, WebServiceRef etc).
The auto deployer could expand the "/deploy/file.ear" file to a temp dir, change each WAR files for Liferay (just like is done with single WARs), rebuild the EAR then copy it to deploy dir.
Other portals like Gate In and Websphere Portal Server already can handle this type of deployment.