The Distinction Between Patriotism and Nationalism...
is something I've been interested in for sometime. The following definition is attributed to journalist Sydney J. Harris by a commenter from France to the Marmot's post entitled Someone needs a hug, reporting often über-nationalistic Korea's dismel performance on a University of Chicago survey of national pride:

Patriotism is proud [sic] of a country’s virtues and eager to correct its deficiencies; it also acknowledges the legitimate patriotism of other countries, with their own specific virtues. The pride of nationalism, however, trumpets its country’s virtues and denies its deficiencies, while it is contemptuous toward the virtues of other countries. It wants to be, and proclaims itself to be, “the greatest,” but greatness is not required of a country; only goodness is.

For the interested, other useful definitions can be found on this recent post of mine: Patriotism vs. Nationalism.