There are 6 or 7 1L's at my firm as SA's.
Just to clarify, too, what I was saying earlier:
If you want to stay in St. Louis, yes, SLU is not going to cause you any problems just of its being SLU.
However, I'll take that a step further and say, I still think a very high class rank at SLU can give you at least a foundation to work with for finding desirable employment in markets other than St. Louis, if you're willing to put in the legwork of making contacts, selling yourself, etc.
This may be the point that my Wash U colleagues disagree with me on.