Useful wireless links
Standards
IEEE wireless standards zone
IEEE 802.11 wireless standards

Organisations
Wi-Fi Alliance: A nonprofit international association formed in 1999 to certify interoperability of wireless Local Area Network products based on IEEE 802.11 specification

Guides
YourWireless.Net: Your Guide to WiFi
Guide to Ad-hoc wireless home networks
Wireless LAN Info Centre

News
WiFi Soup: News and stuff on WiFi

Hotspot directories
WiFinder: Worldwide Hotspots Directory
The Wireless Node Database Project
Jawug
Technical tips
Cisco Aironet 350 PCMCIA Modifications
List of Prism2 cards