This is my first post...so here goes....
I made a Mei Tai ("May Tie") for carrying my daughter around the house. She is about 5 mos. and sitting up now, and my baby bjorn and pouch slings have gotten just too heavy.
I loosely followed these directions: http://www.sleepingbaby.net/jan/Baby/asian.html but made several changes to the design.
You can see my pictures of the project here since this website won't allow me to post pictures yet:
First, I added a pocket on the back with a key clip and toy loop. I made these from thin binding and pilfered the clip from an old camelbak.
Second, I had one continuous waist strap that goes through the entire bottom of the mei tai. I also pulled this from the old camelbak and wrapped it in batting, then fabric, to make a nice padded strap. Third, I made the inside from a quilted poly fabric, mostly b/c that was what I had, but also for extra comfort for baby.
And she seems to be comfy! You can use a Mei Tai for a front or back carry, and so far, both are pretty comfy.