I really cannot afford seperate columns, as the description will contain more than just CPU and MHZ. My plan is to use only ONE table for CPU, RAM, HD, Monitor, case, NIC, MB, and videocard.

Then each of those gets their own column, too. You've got to believe me. Make sparing use of PostgreSQL's array capabilities, because you're missing the point of relational databases if you use them too much.

If you want to discuss this more, email me at beppu@lineo.com. Meanwhile, I suggest you check out SQL for Web Nerds over at ArsDigita. It's a very nice introductory text.

They also have the classic SICP in its entirety over at ArsDigita if you're interested.