These are knitting-related things I like.

The Yarn Lover's room which has lots of free patterns for both knitting and crochet, and useful instructions for beginners. which has lots of annoying adverts
The Craft Yarn Council of America which has lots of hints and stuff, and patterns, and stuff
Historical Knitting Patterns does exactly what it says on the tin
Arabian Knits which has lots of useful links for Arabic knitting and historical knitting, and general stuff; her cookery page is also rather good.

These are yarn suppliers &c

Yarn Forward yarn and supplies, but also a handy needle size conversion chart
Lion Brand a yarn brand, but also they have lots of free patterns

Mailing lists and blogs

The new and exciting london.crafts mailing list/sewing circle.
Punk knitters livejournal community.