Here are some tutorials/ideas that I think are really worth checking out. The first one is for sewers and the second for knitting/crochet.
and here's a link for crafty folk who do neither of those things but would still like to do something creative!
Make a tshirt into a custom sillouette tshirt aka DIY Screen Printing. (simple!)
And this one is just kind of funny... The Entertrainer! a heart rate monitor that works with your tv, for excercise... if you slow down your TV volume drops! AHAHA i love it.