This is the ultimate embroidery blog. A good proprtion of what I have learnt in the past few years is down to Mary! Her Video Library of Embroidery Stitches is particularly helpful, and she also has a library of free patterns. She posts pretty much daily, and occasionally gives stuff away (though hundred's of people comment to try and win it).
A pretty good source of lots of different embroidery threads. I don't think I've ever seen quite so many in one place.
My favourite supplier of silks. Expensive, but so yummy!
Cute quirky free designs
Another very useful site, with stitch instructions, articles and good links.
Downloadable E books a great source of free patterns and instructions for all kinds of crafts. I particularly likeTherese de Dillmonts Broderie en passe and motifs de broderies.
More free patterns, these are Victorian.