stacey, I don't think so.

I'm thinking thats just metal fatigue and the spoke pulled through.
If it were overtightened I would expect to see more deformation
around the spoke hole. This occured in the side wall of the rim
not the inner surface which I believe also rules in favour of the shop
not being heavy handed.
Sammyboy, did they tell you it was farked, or did you discover it
on your own? the reason I'm asking is that if this is a shop you use/like/trust
than maybe it occured after the true and they weren't aware of it.

marty