Three or four years ago (I'm 18 now, so 3 years is a rather big difference) I had my flat serve clocked at 90. Now I'm sure even my topspin serves are approaching 100.
As for hitting the fence on one bounce...wow, I don't even qualify a serve as worth while hitting if it doesn't. A "good" serve needs to land at least 2' up the fence. "Great" serves hit the fence at 5'. And I've had two serves stick in the fence at nearly 6' (those really made me happy). My goal for the summer is to get one to hit the cross pole that lies in the vertical middle of the fence.
I must say, though, that my most impressive serve ever was when I was demoing the n6.1 and I hit one that went cleanly through two separate fences which had about a 4' gap between them. When I serve w/o a partner, probably 15-20% of my serves go through the fence, so that wasn't a surprise until I saw it continue through the second one. I can't give you numbers for speed or revolutions on it, but it must have been a damn heavy shot.