AP hopping & hiding clients from each other

All,

2 items:

1.) Has anyone seen any info on how to "disguise" the wireless clients
from each other?  I want everyone to be able to bond to my APs, but I
don't want them to be able to "see" each other - I just want them to be
able to go to the internet.  This is probably just a wild dream, but I
figured I'd ask.

2.) Has anyone had any problems with dropping sessions when you move
from one AP to another?  I run a wireless network on a college campus,
so naturally we have dozens of APs.  The problem is that some classrooms
are right on the "dividing line" between APs, and the clients tend to
keep hopping back and forth between APs.  When they do this, it
basically messes up all of their network connections and they have to
start them over.  Does anyone know an effective solution to stop this?

Thanks!
 
DeWayne Mangan
ITS Infrastructure Manager
Concordia University at Austin
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