Here are some links relevant to the embroidery class tomorrow evening.
A few online stitch dictionaries: Rissa's Pieces, Victorian Embroidery and Crafts, Johanna's Needlework Stitches.
Good embroidery blogs: Pin Tangle, Feeling Stitchy (which has a Flickr pool), the Lovely Textiles embroidery category.
Amazing embroidered felted knit pieces by Harpa Jónsdóttir. Art embroiderers: Louise Gardiner, Kate Jackson, Daniel Kornrumpf, Harriet Maxwell.
Embroidery samplers, showing how the stitches themselves can be lovely even when they don't form pictures. And another: a four seasons piece made from detached chain (lazy daisy), straight stitch, French knot, and Danish knot (detached Palestrina stitch) only, densely spaced and in appropriate colors that give it a lot more interest than you might think from the list of stitches.
A gallery of crazy quilts, one craft in which embroidery is used quite heavily.
Images of work done entirely in French knots. More individual stitches: fly, feather, chain, detached chain, herringbone and buttonhole.
Free geeky cross-stitch patterns and more classic cross-stitch patterns, from Sprite Stitch and DMC, respectively.