Attached is a diagram of what I've come up with now, with 3 APs per floor (and another single AP for the rooftop pool/lounge). I'll daisy chain them (not pictured) since the building is over 100' tall, and running CAT5e to 100' isn't the best for throughput.
The large blank area is for the Telco I plan on pitching to everyone. Replace everyone's analog line/phone service with two T1s (48 units in the building).
Haven't started cost estimate, but when I get rid of the crummy cable service and 14 analog BUSINESS lines we have coming into the building right now - I just may have enough in the budget for a fract T3/OC3.
Edit: Argh. Forum settings won't let me attach a 50 KB file (fyi, I work for CommunityServer). See link below.
(click for full image) 