Those things are Serial ports for use over WiFi, they just transmit the RS-232 signals from a computer to the WiFi serial port. You would be able to connect the Amiga to a PC via Null-modem but nothing more.
Think of it as a wireless serial cable.
The page sez:
Secure iWiFiâ„¢ is a serial-to-WiFi device server that enables installed serial devices to connect via their existing serial port to the Internet over an 802.11b/g Wireless LAN.
So it does work over the wireless network but programing it is another thing. Did you look through the docs. to see how to initialize the beast? If it is anything other then a remote login (connect directly to the device via its wifi) then you'd need a PC or something to run what ever sofware is needed to set it up.
Keep us informed cuz this is highly COOL!