A central organization of information about cohousing is Cohousing: Building a better society, one neighborhood at a time, which offers a wealth of information, articles, perspectives and resources about the topic.
If you're interested in joining a cohousing mailing list, look no further than Cohousing-L.
The Cohousing website's Directory of Communities.
From our Our Resident Guidelines:
Consensus is much more than making decisions at business meetings. Consensus is a microcosm of life in cohousing. It's about really listening to and being sensitive to the concerns of others. It's about finding common ground. Ultimately, it's about building long-term, healthy relationships.
There are also many books on the topic of cohousing, including Creating Cohousing: Building Sustainable Communities by Kathryn McCamant and Charles Durrett (2011), now in its third edition.
This video about a film called "Cohabitat", while not featuring Tierra Nueva, might give you a sense of what cohousing is like...