For a while, the locally produced Hymns of Truth and Light of First Congregationalist Church (UCC), Houston, Texas has appealed to me as a good alternative for both the ten-year-old UUA produced Singing the Living Tradition and the much older joint Unitarian and Universalist hymnal (Hymns of the Spirit) that we use here in Washington. Indeed, it seems like a blend of the latter hymnal and the Congregationalist Pilgrim Hymnal brought up to date. It is my understanding that a member church of the UUA has adopted Hymns of Truth and Light as its own.
Now there is another hymnal I'm looking towards: the yet-unnamed 2004 hymnal of the National Association of Congregational Christian Churches (NACCC). There's a good amount of information about this hymnal at their site, including a list of hymns retained from (of course) the Pilgrim Hymnal
Link: NACCC New Hymnal Committee