Ta-Da! I have finally made a video on how to make a pouch sling. Here are the materials you will need:
2 yards of pretty fabric (this could be just about anything: calico, corduroy, silk brocade, etc)
2 yards of baby flannel in coordinating color
A friend to share your fabric with (this will make two slings)
**update: After a few questions about this, I wanted to let everyone know that you do not HAVE to use baby flannel for the lining. You can use the same fabric you are using on the outside or anything else you'd like. Also, if you want your pouch to just be one layer, choose a fabric that is double sided (like seersucker) and just hem the edges after you cut it down the middle. I choose baby flannel b/c it is soft, that's the only reason really**
**second update added March 2010: The width of your fabric should be 45". If you really like a wider fabric, by all means get it! Just trim down the side before you start. The wider the fabric you start with, the deeper the pouch will be.**
The video will walk you through all the steps. Please let me know if you need more help. Good luck!