Dave, you are of course right, "Ich bin Wiener" is more common (but less fun in the context of this thread) than "Ich bin ein Wiener". The "ein" can be said and in my feeling gives the statement more emphasis. Kennedy's goof is an urban legend. In the context of his speech "Ich bin ein Berliner" was the best possible choice, far better than "Ich bin Berliner". (Of course, we boys then smiled about the double meaning) BTW, had he said "Ich bin ein Amerikaner" that also could heve had a double meaning of something sweet to eat [cookies with chocolate frosting or powdered sugar frosting].

John F. Kennedy in Berlin

The gaffe that never was

Wolfgang