If you are interested in how things are playing out in the Anglican Communion, Rowan William's nuanced article in today's Guardian will be worth checking out.
Responding to the ECUSA's (the American Episcopal Church) plan to ordain practicing homosexuals, Williams said that same-sex blessings were "at the very least analogous" to Christian marriage and people living in such unions could not "without serious incongruity" have a representative function in a church whose public teaching was "at odds with their lifestyle".
(h/t The Guardian)
UPDATE: The ubiquitous Tom Wright gives his response here. And for a slightly different take, Glenn Davies gives his response.