The document summarizes barriers to the successful commercialization of MEMS (Micro-Electro-Mechanical Systems) and provides grades on the industry's progress addressing these barriers from 1998 to 2008. While infrastructure and R&D received high grades of A, areas like marketing and capital formation received lower grades of C. Many opportunities exist for MEMS applications, but commercialization challenges remain such as designing for manufacturing and testing from the start. Lessons from MEMS' experience can help guide nanotechnology's commercialization efforts.