No. Generally speaking (and there are exceptions here) one is not allowed to ask a Gentile to do something for him on the Sabbatgh that he himself is forbidden to do.
Doing so to answer a thread that could just as easily wait until tomorrow would not be permitted.
Zev Steinhardt
Say huh? Was there not back in the Old Country such a thing as the Shabbes goy?
Ah, thanks, zev. I’ve heard of some of the exceptions to your rule (can’t remember what they are off the top of my head), but I guess the criterion is that they can’t wait until tomorrow?
checks clock Oh goody, it’s not Saturday!
Something I’ve always wondered, though maybe it should have its own GQ thread – what counts as ‘work’ on the Sabbath? I understand driving is supposed to be work, as presumably is cleaning, but posting on a message board doesn’t seem a particularly onerous task. Would writing in one’s LJ or non-electronic journal be work? Reading a book for pleasure? Watching television? Cooking is work, but does popping an already-made casserole into the oven count? If so, then is Sabbath salad-time? If you wouldn’t ask a gentile to work for you on the Sabbath, does that mean that you couldn’t eat out either, as someone had cooked that food? 
These are actual questions. I’m intrigued by the idea. I imagine that the ideal would be to spend the day in quiet contemplation, but I have the feeling that I would want to pick up a book at some point. 
The problem with using a computer is that one of the rules is that you are not supposed to kindle a fire. Having an existing fire is OK, but starting a new one is right out. And electricity is considered fire. And for the computer to function, you have to open and close lots of tiny circuits. And each time you do that, you are kindling a liiiiiitle tiny fire. It would be OK to read books, or to write using some non-electric appliance, as long as you aren’t reading and writing for work.
As for food, you can leave your oven on “warm” and keep food in there for Friday night and Saturday, you just can’t turn your oven on and off. And you can keep your refrigerator running, but you should unscrew the lightbulb before Friday so that you don’t turn on the light when you open the fridge for a midnight snack.
Why is electricity fire? I remember Richard Feynman had a thing about that in his book, and how he, as an agnostic Jew, found it ridiculous. Is it just that it acts on a functional level like fire, in that it provides energy to power things?
There are severe restrictions on what one can ask a Gentile to do on Shabbos. A “Shabbos goy” is not a person who can do anything for a Jew that they ask for. There are restrictions on what can be done, and how one may ask for things to be done. Suffice it to say, one cannot ask a Gentile to print up a thread for him on Shabbos to review or to post a reply.
Zev Steinhardt
But could you print out a thread you knew you wanted to read before Friday night, with the intent of reading it on Saturday? That seems similar to driving to the bookstore on Friday morning to buy a new book you want to read on Saturday. But you couldn’t ask a friend to drive to the bookstore on Saturday morning to buy you a new book, even if they weren’t Jewish.