W1AW Propagation Bulletins for 2000
The American Radio Relay League's propagation bulletins.
www.arrl.org/w1aw/prop/   reviews

Radio Propagation Conditions
Links to many propagation reports and weather forecasts.
www.hamradio-online.com/propagation.html   reviews

Solar Activity and High Frequency Propagation
KSU Amateur Radio Club W0QQQ provides high frequency propagation indicators.
www.k-state.edu/ksuarc/solar.html   reviews

Amateur Radio Reference - Propagation
Global maps and many propagation links.
www.panix.com/clay/ham/propagation.html   reviews