I had a comment from Ann yesterday asking why we used a foundation for the HeartStrings projects rather than just sewing the strings together the Gwen Marston way. Since it's a question I get fairly frequently I posted an answer on the HeartStrings Blog along with some of my favorite books on string quilts.
From a personal standpoint, when I do use a foundation I use muslin because I HATE to pull the paper off once I've finished piecing the block. Because I tend to work with strings and strips of different lengths and like to use even my little bits and pieces it usually is easier for me to use a foundation rather than trying to find strings of similar length to piece a strip set. For patterns like Chinese Coins and piano key string borders that are easily pieced without foundations - I don't use them.
I didn't get a lot accomplished today but did make and sew the binding on for one of the Chinese Coins quilts - I've got it about halfway stitched down and for a change actually thought to grab the label and sew it in the corner when I was stitching the binding on. Now I'll just have to sew two sides of it when I'm done the binding. Why don't I remember to do it this way more often?