I'd like to use a wired connection. The only problem is that the only wired connection is on the other side of the house from my room and my parents are using it for their computer.
In that case, you need a switch so you get many connections out of that one. Then find a long enough cable.
You should never rely on wireless connections for things that need to be "always on". There are many more things to go wrong, compared to wired, though I believe that script helps to some extent. I have tried to go wireless with a miner (and similar things before Bitcoin), but in the end you need to go wired for anything serious. WLAN is designed for intermittent usage, like checking your mail in a cafe, not serious server-type uses.
As for the noise issue, there are
ways to make a completely silent rig, in this case about 818 Mhash/s. Heat is still a problem during the summer, though.