Making Custom Hardware

Ok /prog/

I want to build my own hardware for my computer but have no clue where to start.  My design will be simple game controller with 6 buttons (up, down, left, right, A, start).  I would LIKE a usb connection, but a serial port or parallel seems more simple.

I also need to program it.  What would be the best method for making custom drivers?

Are there any good tutorials for making simple hardware like this? (I'm running window XP)

Keyboard hack

Indeed, sir >>5.  It's likely that you already have an implementation of ``6 buttons'' on your machine.  You need only subclass your existing keyboard and override a few labels.  I suggest buying a copy of Pen, Paper, Scissors, and Glue 2008 Express.  If you're on a budget, I've also heard good things about the freely available ``Imagination'' toolkit.