Unfortunately, I managed to create about nine-tenths of the hat with a needle that was much too small and a stitch that was much too tight. It ended up very stiff and very un-cool. With my typical frustrated huff and puff, I pulled out all the stitches except the tight central circle (My Main Man was very appalled that I would throw away hours of labor in about two minutes). After some quick deliberation, I settled on a treble crochet stitch with a K/ 10 1/2 crochet hook. For the band around the end, I tightened to a single crochet for about 6 rows. Then I decided I'd get a little fancy and sew on a sparkly embellishment (which just happened to be a broken earring I couldn't part with, and now I feel so green for re-using it). Et voila!
So I do have to ask real quickly... do many of you knit or crochet? Would you be interested in me posting some very basic tutorials on how to do various stitches, patterns, or techniques? Let me know!
Update: So many people wanted a pattern for this hat that I posted it later here.