UPDATE: Check out this awesome Cat in The Hat sweater!
Without breaking any copyrights, here are some ideas for some Dr. Seuss themed knitting projects:
Yertle the Turle: Here is a free pattern from Knitty called Sheldon the Turtle. Change the shell color to blue and make yourself a Yertle!
Cat in the Hat Scarf: From Not Martha, here is a fun fur red and white striped scarf reminiscent of our very bad friend the Cat in the Hat.
Who doesn't need Grinch Gloves, like these from blogger Susan B. Anderson?