Thanks for mentioning my blog :-). By the way, anyone who is interested should try decapping a chip. Modern epoxy chips are hard to decap, but you can get an older chip in a ceramic package on eBay for a few dollars. Decapping one is simply a matter of tapping it with a chisel. To see complete details of the die, you need a special metallurgical microscope, but a generic microscope will still show a lot. Even with the naked eye you can see a lot of interesting structures.