Or the Amazing Needle or whatever you want to call it.
It's knitting with a crochet hook and I've been having a blast giving it a go this past weekend. I made a hybrid hat to test it out and fooled around with K2 C2, or knit 2 crochet 2.
For more info check out:
http://knooking.wordpress.com
http://www.ravelry.com/groups/knooking