Yes, they are shipping both drives. (They don't seem to listen to their customers complaints very well.)
So it is completely up to chance which model you get the AS or ASG, and this goes for both the 320GB and 500GB. I took the chance and it didn't work out.
1 out of the 3 computer I got was AS but had bad RAM
2 out of 3 had the ASG and beeped
I finally switched to the 5400RPM drive for my fourth MBP that arrives tomorrow. Hopefully, this one will have no problems. I am not pleased about getting a 5400RPM drive but would rather have a working computer.
Plus, I saved $50 by downgrading, and for $130 you can upgrade to the AS hard drive yourself. So for $80 you could get the correct drive and no beeping, plus a nice little external drive. (I might actually do this.)