Wikipedia: the article on polymer clay.

Glassattic.com: the polymer clay encyclopedia.

Polymerclaycentral.com: the name says it all.

pcPolyzine: an e-zine devoted to polymer clay featuring articles, artist interviews, and tutorials.

Clay Happens.com: polymer clay website directory, with useful link lists for poly-clayers.

Polymer Clay Daily: a blog featuring musings on polymer clay art.

Polymer Clay Workshops: your polymer clay class resource. Worldwide listing of polymer clay classes, webcam demos, exhibits, and more.

Andrea Beeler--Clayin-Around: colorfully caneworked bowls, vessels, and beads.

Jana Benzon--JRB Art and Design: Arabesque Canes, canework in an intricate kaleidoscopic style.

Lisa Clarke--Polka Dot Creations: jewelry, books, videos, and magazines for the polymer clay enthusiast.

Eva Eriksen--Everclay: featuring an extensive list of polymer clay tutorial links including both techniques and projects.

Sue Farace--Crafter's Cafe: good food, local crafts, lounge area, craft parties and classes in a variety of crafts.

Tina Holden--Beadcomber: jewelry and beadwork using polymer clay, glass beads and wire.

Valerie Hollis--Tokens: "What to do with Skinner blends," an educational look at the Skinner blend. In addition to tutorial and informational links, the links section has a who's who list of over 200 polymer clay artists!

Tonja Lenderman--Tonja's Treasures: creative polymer clay vessels, journals, home decor, and jewelry.

Celine Mazureau--Celine Creations: polymer clay, crochet, and penmanship.

Desiree McCrorey--Desired Creations: featuring how to projects and tutorials plus step-by-step pasta machine maintenance with pictures.

Kellie Robinson--Kellie's Klay: many polymer clay covered items and a large tutorial link list.

Elaine Robitaille--tooaquarius: polymer clay beads, jewelry, and Kanzashi (hair ornaments). There is also information on choosing color palettes, creating color wheels, and mapping pictures to design canes.

Kirstin Rupprecht--Kerstin's Fimo Seite: wonderful polymer clay canework. Realistic eye-cane tutorial.

Lynne Ann Schwarzenberg--River Poet Design: functional, wearable artwork in a realistic floral motif.

Jean Sheppard--StarGazer: polymer clay creations utilizing a variety of techniques. Also hosts a webcam chat/demo on Yahoo IM (signup required). To participate, sign up on Delphi forums and join StarGazer's chat here on Saturdays at 1:00PM ET.

Jackie Sieben--The Pleasant Pheasant: the inspirational gallery of Claypen Chat host Jackie Sieben

Linda Weeks--It's Jest'er Clay: polymer clay masks, sculptured figurines, kaleidoscopes and just about everything else, and lots of them too. Cute sculptured duck tutorial.

Bettina Welker--Beadworx: stylish polymer clay jewelry.

Naama Zamir--Naamaza: glass vessels decorated in a floral millefiore style.

NPCG: National Polymer Clay Guild

Polymer Clay Central Message Board: Large online polymer clay community.

Claypen Arts: online polymer clay group hosted by Jackie Sieben with weekly chats and bi-weekly show-and-tell projects. To participate, sign up on Delphi forums and join the Claypen chat here on Thursdays at 11:30AM ET.

Polyclaykunst: German polymer clay community.

Parole de Pâte: French polymer clay community.

SCAPCG: Space Coast Area Polymer Clay Guild. If you live in the Space Coast area of Florida, here is a guild for you.