Hi
i recently fitted a wifi solution for 2 large 5 star hotel.
13 APs in total (per hotel) so 26 all together
i used netgear prosafe WG102s as they were cheap, gave very good range and also use PoE (i needed this because of where we were installing the aps!)
ALL APs had the same ssid, overlapping APs were on different channels, all had the same security.
This gave a roaming effect, you can walk the entire distance of the hotel now without noticing you are connecting to different APs.
Also the netgear has autocell which detects other aps and makes sure the channels do not interfere with one another, it will auto switch if they do
we fitted them around 6 months ago using our own freeBSD based captive portal software (this is the payment and voucher system), feedback from the hotels has been 100%, they have had conferences with over 70 people connecting at any one time and have reported no problems or slow down.
i have to admit when i fitted them i didnt think they would be man enough for anythign like that but are far exceeding any expectations i had..!
hope this helps