Here's a link to one by cakd boss. Let me know if the link doesn't work.
http://www.cakeboss.com/fondantbowtutorial.aspx
I have used the one from cakeboss.com that is referenced in the reply above. It worked great! For my "glue", I used the wilton candy. The last cake I did I decided to try and make the bow out of gumpaste instead. I don't know that will go back to using fondant for bows anymore unless I am wanting to save money on a cake. The gumpaste dries so much harder and it allows you to make the loops thinner for a crisper, cleaner look...just fyi if you are interested! Happy cake decorating!!! 
I can tell you how to make the bows I made for this cake: http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1202024
I bought a 3/4 inch diameter dowel (wanted 1" but they were out). I dusted it with cornstarch and hung it up from 2 loops of curling ribbon (so it would be easy to take down). I rolled and cut a bunch of 5" long, 3/4" wide strips of fondant. I used a clay shaper to smooth the sides, and the wilton pattern wheel to make the stitching effect. I draped the loops over the dowel and gently pinched the ends together on each seperate loop. I let them dry for about 24 hours.
I made long, thin strips of fondant and wrapped them loosely around plastic lollipop sticks for the curling ribbon effect, and put them aside to dry.
Then, I melted 2 oz of white candy coating in the microwave. I put a sheet of waxed paper into a cake pan the size of my top tier, and made a small blob of candy coating. I made a circle of loops inside the pan, sticking the ends into the candy coating. If the ends seemed like they would stick out too far, I trimmed them with kitchen shears. When the circle was complete, I put another spoonful of candy coating on top of the ends, and then added the next circle of loops, again trimming the ends if they needed it. Then I added more candy coating to the center and stuck in the top loops, nearly upright. That was it...then I set it aside to let it harden.
For the smaller bows with two loops, I took two loops that I had dried over the dowel, trimmed down the ends with kitchen shears, and "glued" the ends together with a blob of candy coating, which hardened really fast. I trimmed off any excess candy coating. Then I rolled more 3/4" strips of fondant, added the stitch pattern, and cut them to fit the center of the bow. I used a plastic lollipop stick to form a fold or two in the middle to look like fabric that had bunched up. I wrapped them around the middles of the bows and let them dry.
When it was all dry, I painted the bows with a mix of pearl dust and lemon extract.
Hope that helps!
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