When I went to 168 yesterday, there were a number of shops selling infinity dresses. I even saw one in plus size. It's actually nice to see that it's starting to cater to different body sizes now.
I don't have an infinity dress. I'm not even well-versed in using my infinity top (which I haven't work yet). I did manage to find this site that gives out instructions (with photos) on how to make one. Lucky are those who have a knack for sewing.
Different styles of wearing the dress can be found on henkaa.com. Would love to see photos of those who would take on the project =)