To actually work towards the goal, you need a robust paperclip count for the counter factual, non real worlds, which clippy considers may result from it's actions.
If you postulate an oracle that takes in a hypothetical world - described in some pre-defined ontology, which already implies certain inflexibility - and outputs a number, and you have a machine that just iterates through sequences of actions and uses oracle to pick worlds that produce largest consequent number of paperclips, this machine is not going to be very intelligent even given an enormous computing power. You need something far more optimized than that, and it is dubious that all goals are equally implementable. The goal is not even defined over territory, it has to be defined over hypothetical future that did not even happen yet and may never happen. (Also, with that oracle, you fail to capture the real world goal as the machine will be as happy with hacking the oracle).
If even humans have a grasp of the real world enough to build railroads, drill for oil and wiggle their way back into a positive karma score, then other smart agents should be able to do the same at least to the degree that humans do.
Unless you think that we are also only effecting change on some hypothetical world (what's the point then anyways, building imaginary computers), that seems real enough.
A few notes about the site mechanics
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A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.