hi
I just stumbled over this thread, and maybe the OP and more active participants aren't reading this anymore, but I wanted to point out some valid reasons WHY I would want to do such a thing when, if my desktop has internet access, I could just use the desktop.
For one thing, I do have Wi-Fi and use it for my iPod touch when it works. The problem is my router sometimes decides it doesn't want to work for what reason, and/or my iPod decides it can't find the router EVEN WHEN I HOLD IT NEXT TO THE ROUTER. If I could connect to the internet w/ USB, that would at least work around that problem.
For another, and the main reason I searched for this in the first place, the game apps I play can't be used on my desktop. I've waited for ages for the other players in my games to make a move only to realize the Wi-Fi decided to die again. How do I check updates from my desktop? I don't--I just have to wait until the Wi-Fi decides to play nicely again.
Don't play those games? Well, s'pose I could, but that's no fun. Come on--I got the iPod so I could have something to fiddle with on the go that didn't saddle me with the bulk of an iPad or the contract of an iPhone. I get that sometimes I just have to put up with it, especially on the go, but it seems like a problem that doesn't have to exist.