I dunno exactly what the Zap Stack is, but I like the idea of us sharing tips on all the stuff around WifiDog which we use to run our networks. Here's Wireless Toronto's "stack"; I hope it helps to get us started:

Gateway:

• openwrt
• wifidog
• ntpclient
• crond
• openvpn
• (for all the gory details, see  http://wiki.wirelesstoronto.ca/router_setup_instructions)

Server:

• apache+php+postgres+phppgadmin
• wifidog-auth ( http://auth.wirelesstoronto.ca/)
• wordpress (+mysql) ( http://wirelesstoronto.ca/blog/)
• mailman (+python) ( http://lists.wirelesstoronto.ca/)
• dokuwiki ( http://wiki.wirelesstoronto.ca/)
• openvpn server
• mrtg

Services:

• dns hosting at easydns.com
• IVR hosting for phone-based end-user tech support
• voip service for IVR hosting
• server monitoring