BHPA - British Hang-gliding and Paragliding Association
Avon HG & PG Club - Avon HG & PG Club website
Avon HG & PG Club Yahoo group - Avon HG & PG Club discussion list
British Paragliding Competitions (includes national XC league)
www.paraglidingforum.com - excellent new international paragliding forum

Weather
Chris Jones' weather links page
Weatherjack - very useful site giving soaring predictions up to 5 days in advance
XCWeather - brilliant site reporting realtime conditions (well almost) from airfields around the country
Metcheck - good 7 day forecasts (Wiltshire, Monmouthshire)
WeatherOnline - a useful source of recent past, current and forecast weather data
OnlineWeather - mountain and sailing forecasts, along with links to numerous weather resources, including Met Office forecast charts. I've actually found the forecasts to be a bit up the creek recently, and hardly ever use it now except to look at Met Office synoptic charts (from Wetterzentrale) and the US Air Force Europe forecasts... (view next 5 days here)
Wetterzentrale - Met Office synoptic charts: T +0, +24, +36, +48, +60, +72, +84, +96, +108, +120 hrs (alternatively, click here to see them all in one go)
WendyWindblows - realtime weather reports from flying sites around the country
BBC weather forecast (video)
BBC Weather Centre - South, wind map
BBC Weather Centre - Satellite images
Latest UK visible satellite - updated hourly from the Met Office
Latest UK rainfall - updated half hourly from the Met Office
Met Office mountain forecast for the Brecon Beacons
Meteoblue - Weatherjack reckons we should use this!
Europen medium range forecasts - Alan D swears by this - "850mb (approx 4000') temperature, relative humidity & winds"
Snowdon webcam