Fusion Beads: Great place for any type of beads you are looking for. I buy seed beads, charms and beading material from them.
U Bead It: Specializes in Japanese Seed beads of all types. I use 3mm cube seed beads in my bracelets and can only find these in online stores.
Blue Buddha Boutique: Great store for buying jump rings for chainmaille jewelry. I buy my Aluminum and Niobium jump rings here. They also have great tutorials.
C&T Designs: Carries all kinds of jump rings for chainmaille jewelry. They carry Rainbow Niobium jump rings that I just love.