Here's my prob: I have no built in WiFi, and the router in my house is a far away, so if I were to connect it to there directly, the cable would run across the whole house.
I was wondering if anyone knows if this is possible: Can I somehow connect my PC (which connects wirelessly to the WiFi network) with an ethernet cable to my PS3 to "output" the connection? And if so, how would I go about this? Thanks for your time.
@TheKon, as stated by AmnesiaInnocent, the easiest solution would be to get a wireless gaming adapter, or wireless bridge.
You configure that to connect to your wifi, and then plug it into your PS3's Ethernet.
I use several D-Link DAP-1522 units. This unit works great. It can act as a switch, or a bridge, and if acting as a bridge can connect up to 4 devices to your WiFi.
This one also supports Wireless N, in case your router supports N speeds. I have a couple of PS3s hooked up to one of these, connected via Wireless N, and they work beautifully.
Very easy setup, very simple device. There are cheaper and more expensive options out there, but I use this, as it works great.