Perhaps not as entertaining, but definitely enlightening, is the JewishGen InfoFile on the origin of Jewish surnames, "The Names of Jews."
The Ellis Island they-changed-my-name story (a small, but telling, part of the Slate article) seems to have the staying power of a louse - persisting despite numerous attempts to eradicate it. There is obviously something endearing about people have little or no control of their lives - this, in spite of the fact that those who emigrated from Eastern Europe were, in no uncertain terms, taking control of their lives.
I've written about this media phenomenon before, but I'm still amazed by the staying power of these sort of myths.
* [update, 31 January 2014] I am very pleased to note that the original article
has been corrected by author Bennett Muraskin and posted on Slate. In my experience, journalists rarely pen such corrections and Bennett is to be congratulated for owning up to misstatements and correcting them.