Organizations:
http://www.knifemakersguild.com/
http://www.americanbladesmith.com/

Magazines:
http://www.blademag.com/
http://www.knivesillustrated.com/

Forums:
http://www.bladeforums.com/
http://knifenetwork.com/
http://www.knifedogs.com/

Collector Sites:
http://www.customknifecollectorsassociation.com/

Knife making suppliers:
http://www.knifemaking.com/
http://www.usaknifemaker.com/
http://www.texasknife.com/
http://www.knifekits.com/
http://www.knifeandgun.com/
http://www.alphaknifesupply.com/

Steel Distributers:
http://www.admiralsteel.com/
http://www.crucibleservice.com/
http://www.onlinemetals.com/