I got a copy of The ABC's of Lay Preaching, a recent product of the Midland Union of Unitarian and Free Christian Churches that looks very promising. It isn't a long read, but my flight-wearied eyes haven't been able to give it justice to day.
I'll read it and review it ASAP.
There's a nice bio and "desert island hymn list" about one of the training participants, putting a face on a slice of Unitarianism little known on this side of the Atlantic. (By the way, Anglicans Online are asking its readers to submit their desert island favorite this week. I chose "Eternal ruler of the ceaseless round.")
2008 April 24. Information about it is available online, but I think it would be very hard for anyone outside the UK to order it.