Someone just sent me details of another new Unitarian blog, New Meeting Minds. It's a group blog by the members of Kidderminster New Meeting. It has some excellent posts; there's one pondering on the existence of God and the pleasures of heretical viewpoints; another on spirituality and religion; and one on aid workers and the insight they give into human nature. It's very accessibly written, and a good read.
If you have a UK Unitarian blog that isn't listed on the blogroll on the right, please let me know and I will add it.