I've connected my webplayer to my @home cable modem.
I basically, installed a HD and loaded Win98SE. And because I don't need the modem, I removed it from the motherboard.
I attached an USB Ethernet adapter to one of the USB port on the player. And bang, I'm surfing at the speed of light.
Here's the info on my USB Ethernet adapter:
SMC EZ Connect USB
Fast Ethernet Adapter
I hope that helps