The website of the bishops of the USA has acknowledged the issue of the Motu Proprio today and has even provided a commentary courtesy of their liturgy committee. Nothing as yet from the bishops of England and Wales. The only diocese in England and Wales to have news about the Motu proprio on its website today is the diocese of Northampton and that was published on Friday. It will be interesting to see what Monday brings.
UPDATE 08.07.07. There is a response on the Westminster website.