Some of my favorite Social Networks:
Eons (for baby boomers): http://eons.com/
Facebook: http://facebook.com/
Flickr: http://flickr.com/
Friend Feed: http://friendfeed.com/
Linked In: http://linkedin.com/
MySpace: http://myspace.com/
Plaxo: http://plaxo.com/
Twitter: http://twitter.com/
Vox: http://vox.com/
Xanga: http://xanga.com/
Yelp: http://yelp.com/
Fashion (it is important to keep up with current fashion trends if you are a jewelry designer):
StyleFeeder: http://www.stylefeeder.com/
StyleHive: http://www.stylehive.com/
Social Networks/Forums for Jewelers:
Yahoo Groups has a multitude of Jewelry oriented groups... from Beadingaholics (http://groups.yahoo.com/group/Beadingaholics) which covers all media to Unique Wire Artists (http://groups.yahoo.com/group/UniqueWireArtists) which specializes in wire wrapping to your local metalsmith guilds (here is my local Metal Arts Society - http://groups.yahoo.com/group/MetalArtsSociety/). So take a minute to search Yahoo Groups for topics of interest to you!
ArtMetal: http://www.artmetal.com/
Crafster: http://www.craftster.org/
Deviant Art: http://www.deviantart.com/
IndiePublic: http://www.indiepublic.com/
Jewelry Artist Network: http://snipurl.com/dgr44 [www_doxallo_com]
Jewelry Geeks (formerly MetalChasers) http://www.jewelrygeeks.com/
Lapidary/Gemstone Forum from TaoGems: http://gemstone.smfforfree4.com/
My Handmade Registry: http://www.myhandmaderegistry.com/
Ning - is a network of social networks - you can search their networks or start your own...like Jewelry Artist Network: http://jewelryartistnetwork.ning.com/
Most sales sites have a forum:
Etsy http://www.etsy.com/
Artfire http://www.artfire.com/
1000Markets http://www.1000markets.com/
Your favorite magazines also have Forums and other "Community" resources like ArtJewelry: http://cs.artjewelrymag.com/artcs/
...and last but not least - the "mother" of all jeweler's forums - the Orchid Forum at Ganoksin http://www.ganoksin.com/orchid/orchid.htm
