4. The method of claim 1 wherein said calculating comprises breaking said portion of said username into letter pairs or letter triplets and determining a frequency of occurrence of said letter pairs or letter triplets in a spoken language.
4. The method of claim 1 wherein said calculating comprises breaking said portion of said username into letter pairs or letter triplets and determining a frequency of occurrence of said letter pairs or letter triplets in a spoken language. 5. The method of claim 4 wherein said calculating calculates a high likelihood of pronounceability when said frequency of occurrence of said letter pairs or letter triplets in said spoken language exceeds a threshold.