keyboard and mouse yes, i dont know about the monitor though. what do you need to do on the other computer? you should look into remote adminstration software. if its windows 2000 server you can use terminal services.
my computer is so fast, it completes an endless loop in less than 4 seconds!
you can buy those cables (with the HD 15 pin D shell), but I don't know how long they can/should be. The fact that every short monitor cable I've seen has those ferrites built into it doesn't leave me with the feeling that they are good for much distance.