i recently joined the ravelry community and i'm loving the heck out of it. it's so easy to organize your projects and see who's making the same thing as you, what yarns they're using, etc. it's a bit different than craftster but i like it just as much. plus it's yarn-centered so it's easy to find patterns and the site is just really intuitive when you input what pattern you are knitting/crocheting and what yarn is used.
it's really cool. :)