Communitarianism isn't so much of an ideology as a concept which can be applied to other ideologies. It is in principle just the idea that the community is more important then the individual, that the interests of the community and the individual are the same, and that the accomplishments of the individual are much the result of your community as they are individual accomplishments. Quite a few Communitarians are socially conservative as are socially liberal, as are indifferent to social issues. If I had to pick a particular affiliation among Communitarians, I'd probably say Socially Conservative. A trend seems to exist with Communitarians supporting economically Left Wing programs, such as Welfare, Universal Health Care (of one sort or another), Universal Education, and Regulations. However, this isn't exclusively true.
Recommended Preparatory Reading:
First order of business would be to go decide on the first book to read. The ICPS has a nice listing of books related to Communitarianism, so we have that as a place to start.