Make a path in the shape you want the text to follow, then click on the T for Text Tool and hold it down. This will open up other text tools. Click on the one called Path Type Tool, which is a T on a downhill angle. Click on the shape, then typoe the texy. You can move the shape around once you've got the text on it to get it exactly right. When you're happy with it, convert the text to Paths and you're done. A method that works better for me is to type whatever you want, right click-click on create outlines, then go to effect->warp->arc