I would vote for the Mexican Star also. A friend made one and it was beautiful! The fabrics really make this quilt gorgeous. Where it looks like there is curved piecing it is really a loose sort of "pocket of fabric" that gets slightly turned back to create the curved look. Hard to describe but it is not curved piecing in case you shy away from that technique. There is one pattern listed on ebay if you need it but I am sure you can buy it elsewhere if you decide to do that pattern.
http://quilting.about.com/od/picture...Star-Quilt.htm
And yes, I agree with LynnVT ... what an awesome thing you are doing!!!