I linked to this page earlier today, showing pictures British storekeepers had put up today informing their customers of a moment of silence. If you haven't looked at it, go there now. If you have seen it, go back. Read the comments. All 200 of them. I had to leave one that shows up about 12:27 of 9/12 on the site.
And thanks to Tony, who directed more people to the Briton's fantastic site than I ever could have. It needs to be seen.