We've done yesterday a second release candidate for Nuxeo EP and DM.
and running apt-get install nuxeo-dm.
(You may substitute natty with maverick, squeeze, etc. i.e. the nickname of your current Debian or Ubuntu release but it won't change anything for now).
If you'd like to help, please test the RC2 today if possible and submit new bugs to the Jira.
If you are into IRC, you can join to the #nuxeo channel on irc.freenode.net to participate in this endeavor.
NOTE: this is a release candidate, so don't deploy it to your production servers!