valladaresp,

The part you're looking for would be the WIS08ABxx model. The new WIS09ABGN models will not work with the LN46C850. It may be difficult to find one of the older LinkSticks. If you're not able to get one, you might also consider a wireless gaming adapter with Ethernet, or a generic wireless Ethernet bridge and connect it to the Ethernet port in the TV. Unfortunately, I can't provide support for a bridge or a game adapter, and neither can the Samsung customer service center.

--HDTech