I first came across Andrew "bunnie" Huang when I had a Chumby. I used to read the Chumby blog and he made some excellent posts about the ins and outs of dodgy SD cards. He's got a fantastic perspective on the business of making stuff, with special emphasis on how things get done in China.
He's written a book all about this, which I'm really keen to get a copy of. You can get a taste of the content on the book site, which seems to have a different chapter from the book each day. I've read a couple and really enjoyed them.
If you have any kind of interest in how things are made, or if you have ever fancied having something made in Shenzen you should have a read of this book.