There has been a wide varity of hardware that has been used for the local hot spot locations. The majority of the deployments have been the custom built PC. With the 200mW radios, these would work great for a location that has a big area, and/or has outdoor lounging areas. For initial capture, NoCat (Open Mode) was used.

Around Fall 2004, hardware deployment shifted a bit. The Linksys WRT54G/GS, using a third party firmware proved it's ability to act as a full feature AP. At first NoCatSplash was used for initial capture, but with ChilliSpot being included in the firmware, a shift was made.

Custom Built PC:

Old PC, usually between a Pentium 100 -> 233MHz (Free abundance of them)
48MB or greater RAM
EnGenius 2511 CD PLUS EXT2
Ricoh RL5c475 Cardbus PCI adapter
MiniMag 5.5dB MMCX Omni or 7.5dBi Omni Antenna
128MB Compact Flash card, and IDE<->CF adapter
Pebble Linux - Debian (woody) based Linux OS

Off the Shelf Hardware:

Linksys WET11 LAN Bridge
Linksys WRT54G/GS

Speciality Hardware:

EnGenius NL-2611CB3+ Deluxe
EPIA 5000 Mini-ITX motherboard
WRAP 2C with Atheros CM9 radios
WRAP 1D with Atheros CM9 radios
WRAP 1E with Atheros CM9 radios
Atheros AR5004X CM9 Wistron a/b/g MiniPCI Radio
Senao NL-2511MP PLUS 802.11b MiniPCI Radio

Antennas:

Mini Mag 5.5dBi 2.4GHz MMCX - Quite of a few of the older model of these antennas have been used.
9di VPOL Omni w/7Deg downtilt - These are used in the majority of the outdoor installations.
12dBi 2.4GHz Mini directional - One of these was used when the location required a very discreet antenna.
14dBi 2.4GHz RooTenna - These are great, since not only are they an antenna, but also have a 2" deep enclosure for the radio.
19dBi 5GHz RooTenna - Quite a few of these are used for the 802.11a backhauls.
SuperPass - Have used a few of their 90 and 180 degree sector antennas in specialized locations.