Yesterday Once More Listings of music theme festivals, weekends, and concerts, throughout the UK, Europe and the USA. http://www.yesterdayoncemore.co.uk/

Virtual Festivals Provides coverage of upcoming events, photos, reviews, artist interviews, and discussion forums. http://www.virtualfestivals.com/

Woodstockhausen archive Concert programs, mp3 files, pictures and information about each gathering. http://nosuch.com/wsh/