Alright this is what I have so far...
A motherboard that has Dual socket, that can run quad core chips, 4 dimms slots,each slot consisting of 2gb of ram, total of 8gb 800mhz/1600mhz ram total. 3/4 Pci-e - 1gb 512bit gddr4 graphics cards, all on crossfire ( I can only think of one way to have 3 cards running at the same time, they would have to add another top crossfire part to have a 4th card. ) The two sockets would both have amd/intel true quad cores running at 3ghz each core, so if you added them it would be 12 per socket at a total of 24ghz per total. Then I would have 1-2tb of HD space. ( is it terabite or terabit? (1000gb) ) With a nice powersupply at 1300w ( is too much power a bad thing? lol ). All water cooled down. And to finish it off, a nice overclock on each core:

100mhz ea core = 24.8ghz
500mhz ea core = 28.0ghz

Im also not sure if you can overclock each core, more like each processor all in itself. So what do you guys think?

Also I have given much thought, and a system this seriously powerful, whats the point, we have no technology to support ANY of it at all. ( as in nothing better that would actually be worth the vast amount of speed/power it makes.

Feel Free to post your ideas/comments! I bet this'll be interesting to think about...