Hi Oh,
I think 05 has given you some good advice.
The ss# is also used as your son's id on the ncaa clearinghouse. (You'll register him in his Junior year).
And as for you question "does a questionaire as a sophmore indicate real interest for the future"....that really depends. SO much can happen between then and now. Obviously they've identified your son somehow, whether it has been from a showcase, (we received questionaires galore after attending Team One) or from your sending them a letter of inquiry...the ONE thing I've learned through this process and from the many helpful websters on this site is to not try to read anything into it.
I remember a thread where we discussed trying to find out why/what the numbers at the top/side of the questionaires meant. Code? Smoke Signal????
Enjoy.........you're in for a WILD ride
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"People ask me what I do in winter when there's no baseball. I'll tell you what I do. I stare out the window and wait for spring." Rogers Hornsby, Hall of Famer