Since the instruction of Street Fighter 4 for the arcade and console, I have been wanting one forever. Two weeks ago, I finally decided to do some hacking here and there to get an arcade up and running. Initial idea was figure out how to use my existing mame cabinet. Scratched that after deciding that it would take too long and really wanted a 2nd machine.
The adventure started with me going to all the stuff I have collected over the years that's arcade related from craiglist.
Here's some parts I have:
actually got a full x-arcade cabinet with dual joystick from someone for $100.

This thing has been inside my garage in pieces for years now.
Of course with the cabinet, there's the dual joystick as well.

I am not a big fan of it, but got it for the interface when I initially wanted to hook up my xbox and ps2.
I am a big fan of the Xbox 360, so got that too.
Also pickup a copy of SFIV.
With these things started down the road of build an ultra cheap SF4 arcade.
So the 1st thing was trying to figure out how to get the 360 to use arcade sticks. After some reading, that was easily solve by hacking in gamestop madcatz gamepad.

These are super easy to hack. common ground with big solder point, what more can you ask for. and at regular price of only 24.99 each.
The 2nd issue was I needed a display to put into the arcade, but at the same time I didn't want to spend any money right now if I don't want to. Got a 20in CRT around which would work, but how can SF not run on high def. Then it cross my mind that I have a spare 20in widescreen lcd.

now the part is how to get it to work with the 360. after some looking around, found that they do make a 360 to vga plug. so off to good old monoprice to grab one.
http://www.monoprice.com/products/product.asp?c_id=108&cp_id=10830&cs_id=1083005&p_id=4010&seq=1&format=2at the same time also pickup an 3.5mm phone to dual rca able to connect the audio from the vga cable to a pair of cheap computer show speaker.