I've personally expirimented with them, and I haven't found one that does work. If someone has found one, that'd be great information to share, but at this point, I don't know anyone who has.
Also, the wireless feature is for the InfoLink functions only.
For the 650 does the USB-to-wireless dongle that's needed for wireless connection to the home network need to be Samsung's specific product (WIS-08BGX)? Would a 'generic' Linksys USB-to-wireless device work?