Here is my favourite list of links

http://www.abbaannual.com/
http://www.abbafanclubshop.com/ (best shopping secured items)
http://www.abba4therecord.com/ (golden mine of sleeves)
http://www.abbafanclub.nl/
http://www.abbainter.net/
http://www.abba-intermezzo.de/
http://www.abbaontv.com/index.html (golden mine of informations)
http://www.getabba.com/ (golden mine of pictures)
http://felpin80.tripod.com/ata/ (golden mine of informations)
http://www.fortunecity.com/tinpan/abba/732/
http://abbaarticles.blogspot.com/
http://abbamikory.blogs.com/
http://www.hot.ee/abba/ (golden mine of collector sleeves)
http://www.agnetha-forever.de/
http://www.abbareleases.net/
http://www.fortunecity.com/tinpan/motorhead/592/
http://www.agnethaarchives.com/
http://www.thorsven.net/
http://sites.google.com/site/abbatoday/
http://www.abba-world.net/ (golden mine of informations)
http://www.carlmagnuspalm.com/
http://www.raffem.com/
http://members.fortunecity.com/frida2/
http://www.fortunecity.com/meltingpot/huntington/108/


I may have forgotten some, sorry .