Do your homework. Yes you can use wireless for the Olive Opus. The web site is full of information including great pictures of the front and rear.
http://www.olive.us/p_bin/
The following is from the data sheet available on the web site:
Networking
Wired 4-port switch, auto-sense (10/100) Fast bandwidth for seamless multi-room audio streaming (up to 5 rooms simultaneously)
Complete infrastructure to set up your own home network.
Wireless 54 Mbit/s WLAN-Access point (802.11g)
Protocols UPnP A/V and Apple Bonjour (formerly Rendezvous) Automatic recognition of networked devices
Allows streaming from and to MP3 player software such as iTunes.
http://www.olive.us/p_bin/
The following is from the data sheet available on the web site:
Networking
Wired 4-port switch, auto-sense (10/100) Fast bandwidth for seamless multi-room audio streaming (up to 5 rooms simultaneously)
Complete infrastructure to set up your own home network.
Wireless 54 Mbit/s WLAN-Access point (802.11g)
Protocols UPnP A/V and Apple Bonjour (formerly Rendezvous) Automatic recognition of networked devices
Allows streaming from and to MP3 player software such as iTunes.