Popular Craftsmanship
I've pointed to interesting computer case mods before, and plan to continue doing so when I run across stuff I feel is in a league of it's own. Check out these pics of the Blackmesa HL² by piloux. The attention to detail is simply amazing, regardless of what you think of the look. There's a huge thread in the bit-tech.net forums documenting the process.
Another equally impressive mod is Orac³ by G-gnome. Check out the pics on the first page of Part 5 for a look at the finished mod. There are five articles documenting the modding process, parts 1, 2, 3, 4 and 5.
Case modding is an interesting art, as the artwork itself is also a tool. One might claim case modding is a decendant of the artful hand crafting of tools common before industrialization of our society. In any case, some case modders simply are in a league of their own.