[quote name='fatez']would any wireless usb network adapter work? like a generic one that maybe goes for 25-35 dollars?[/quote]Nope.
The only one that works via USB connection is the MS adapter. Anything else has to be bridged through the Ethernet port.
[quote name='tokitoki50']I don't think so. Although you could get a router for about the same price, flash it with dd-wrt and then use it as a wireless gateway. Kinda tricky, definitely doable though.[/quote]I do this already to bridge my 360, PS3, Wii (via USB Ethernet adapter) and OG Xbox online.
If you want more secure security for wireless than WEP, I'd advise against it, as it's more than a little tricky to get it to work with WPA or WPA2. If you're OK with WEP, then you won't have any issues with doing it.