Ben Bernanke, economist :: Marginal Revolution
Greenspan's replacement

Anyone who replaces Alan Greenspan will be known as Greenspan's replacement no matter who they are.

Tyler Cowen of Marginal Revolution provides a nice, quick tour of Bernanke's contributions to economics.

It looks like Bush has made a very sensible choice. Russell Roberts had some fun with this angle.
UPDATE: Great roundup of opinion on Bernanke at Glittering Eye. Thanks to Economist Laberinto for the link.

ANOTHER update: See also the roundup at New Economist.