Hi Tim:
Thanks for the reply. I figured the answer would be 'it depends,' but I figured I'd ask anyway. :-)
We had a brief RF survey done, but nothing formal. Since it's an older, wooden building, the feeling was that the hallway placement would work fine.
But we did replace AP65's with 225's over the summer.
I didn't realize they would run 80Mhz channels with older 3400 controllers! Shutting of 80Mhz channels is probably going to help. If that doesn't I'll back it off to 20Mhz, and see if that makes a difference.
If I can make it through this academic year, I can probably do an every other room (or every 3rd room) AP install next summer.
Thanks,
Tony