Etsy - an endless supply of beautiful handmade items.

Delphi Glass - a great resource for glass, ceramic, and jewelry arts (supplies, information, and galleries).

Bullseye Glass - gorgeous glass for stained glass, fusing, blowing, and torchwork.

Bearfoot Arts - unique lampworking supplies, tools, handmade beads, and jewelry by husband and wife team
                          Scott and Monica Bouwens.