Yep - my dealer emailed me back last week as I thought it worthwhile to try and get near the front of the queue :
"Good Afternoon Mr Eight, As per the article you have highlighted, we are awaiting Lexus to advise us which models are affected. I have kept a log of your enquiry and will be in touch as soon as we have an update, Lexus have advised we should have this by the end of April this year."