I installed a new WRT54GL in my server closet today (easier than running a wire to it). My LAN now has a total of 4 access points on it. I remember not that long ago when conferences used to have less than 4 access points for the whole conference..
While setting this up, I learned that OpenWRT's client mode is to be avoided. It can result in DUP packets sometimes (I think it's because the client mode AP actually acts as a repeater, so if both APs see a packet, it'll get duplicated), and it seems that IPV6 doesn't work at all over it. Instead I have the 4 APs configured as two separate wireless networks consisting of two APs each, connected with WDS. This works well.
Hurrah for microwave radiation..