E.H.
I believe this carrier is called a "chunei", and it is originally from Korea. I've never tried it, but I know someone who uses them, and loves how the weight of the child is distributed all over your upper body. I never wanted to use it because it is basically a top and baby carrier in one, and just not my style.
If you want to get more info on carriers, check out the local babywearing community at www.slingsinthecity.com. They have an online forum, and monthly meetings thought NYC and NJ. Another great resource is the international group, www.thebabywearer.com.
I hope this helps!