I have configured a Sun Ray 2 in my bedroom without running any CAT5 Ethernet cable in my walls.
I used a Linksys model WAP54G wireless access point configured in AP Client mode. It talks wirelessly to my Linksys WRT54GS router which is connected to my AT&T DSL Internet connection. I am using the Sun Ray's built-in VPN client to talk to the corporate firewall at work.
Samsung LCD TV with a HDMI/DVI cable to Sun Ray 2
Sun Ray 2 with built-in VPN
Linksys WAP54G wireless access point
Linksys WRT54GS wireless router
AT&T Netopia DSL Modem
Cisco PIX Firewall
Of course the Sun Ray 2 is silent so it makes a good sleeping partner. :)