I integrated Plone very easily some months ago in a test machine. But lately I've found these two programs that look even better than Plone: www.nuxeo.org Very nice program. Looks great, I've installed it very easily in Windows and it's really good. I don't know if linux integration would be so easy... The roadmap looks very promising. But at the moment they only have english, german and italian languages, and adding a language doesn't look very easy... www.magnolia.info I haven't even made it work yet, there isn't much documentation. But I'd like to have a try (15 languages, spanish included). It is a very versatile and robust ECM engine.