Sew Simple Dress has published a pair of tutorials showing how you can make your own wrap tunic or dress. The style is based on a vintage sewing pattern for a dress with open sides that ties at the back and then again at the front. Go to her first post to see how to adapt a basic A-line dress pattern to make the wrap dress pattern. Go to the second post to see how to sew it together to make the dress.
[photo from Sew Simple Dress]