VNC already well here
As mentioned in a couple of previous posts, there's already remote access apps for the iphone that are official and authorised by Jobsus' sword of a thousand truths. I've been using one for the last six months called Jaadu VNC, and using it more often than i suspected i would. It lets me check on and control my home laptop and servers, and has come in handy on more than a few occasions, from dropping local files into gmail attachments to checking my wow auction house toon.
Having said that, it drops the screen colours to 8-bit or less, and is annoyingly slow on aussie 3G. Still gives me full control of both boxes, and i can make say photoshop load and convert a huge file to another format from a beach or a pub, the latter being more likely.
I've also used it with embarrasing frequency to perform a variety of mundane tasks without having to get my fat arse out of bed. It certainly is a lot snappier on the local wifi lol