Here's a bunch of Wireless Access Points. Most of these support an external antenna and are fairly reliable.
Save yourself some money and gain a lot of features - see NodeBuilding to find out how to build your own Wireless Node!
Cisco Aironet 1200 and Aironet 1100
Apple
Apple Airport Access Point with 10/100 10base Ethernet, V.90 56Kbps modem, internal Lucent (for attaching an external antenna) and 128 bit WEP.
Linksys
WAP-11 Access Point supports 128 bit WEP, bridging. Has two Reverse Polarity TNC connectors
BEFW11S Wireless Access Point, Cable/DSL Router and 4 port switch
SMC
EZ Connect 11 Mbps Wireless Access Point
EZ Connect 11 Mbps EZ Connect 802.11a Wireless Access Point
DLINK
DI-764 D-Link AirPro Multimode 2.4/5GHz Wireless
D-Link DI-754 AirPro Multimode 5GHz Wireless Router
DI-614+ AirPlus Enhanced 2.4GHz Wireless Router
D-Link DWL-900AP+ AirPlus Enhanced 2.4GHz Wireless Access Point
DWL-6000AP D-Link AirPro Wireless Network 2.4GHz/5GHz Multimode Wireless Access Point

DWL-5000AP D-Link AirPro Wireless Network

