If you hang out on Twitter, follow some of the manufacturing blogs, or just read the business section of the papers, you may have noticed that suddenly manufacturing is a hot topic. From being the old-economy, dirty, boring subject nobody wanted to pay attention to because everything virtual, online, mobile or i-ified was more fun, and manufacturing was dying anyway, it's now gone to being the hero that's dragging the country (slowly, painfully, but still. . . ) out of recession.