In his March 24 live webcast demo on Mixture Designs, Lou Valente referred to the work of John Cornell and promised to point you to data that you can use to try the Custom Design and Mixture platforms in JMP for yourself.
The book is priced at $69.95. The sample data files, however, are free and downloadable from SAS. Please read the SAS notice before you download and unzip the data. 15_Three Polymers.jmp is the polymer data Lou used in one is his examples.