Paul McCartney surprised everyone tonight at the Queen's Diamond Jubilee Concert by using a Union Jack Höfner bass guitar during the closing number, Ob-la-di, Ob-la-da. The Union Jack Höfner is an original design from Höfner (Product #514179 from 2008), based on Paul McCartney's 1962 Violin Bass, but has since been discontinued. You can see pictures of the model here. Now that Paul has used one in concert, I'm sure the used ones will start commanding high prices on ebay.
Here's the McCartney performance, from YouTube.