>Peter,
>
>Just to add a piece of info...
>
>If I recall correctly, in Jim Booth's and Steve Sawyer's "Effective Techniques..." book, there's a mention of the fact that Social Security Numbers aren't necessarily unique.

Yes, he did. That note is on page 20. Illegally [forgers, crooks, etc.] and legally [our Gov't]. Isn't that a comforting thought? :(