The latest newsletter of Synagogue 3000 has an interesting article, Synagogues That Get It: How Jewish Congregations are Engaging Young Adults (PDF), by Tobin Belzer and Donald E. Miller.
Among other conclusions:
Protestant, Catholic, Muslim, and Jewish congregations that are successfully attracting young adults take similar approaches to engaging members of this population. Likewise, young adults of each faith who are interested in congregational affiliation share similar motivations, needs, and desires. Similarities among young congregants in these four faith traditions far outweigh the differences.