If all you want is toggle 110/230V remotely, get an ePowerswitch S8 from ebay. They come with 8 serial switchable sockets. If you need web/lan switching, get the M4 or D4 model with only 4 sockets, which also go for about 70 EUR on ebay.
If an O2 isn't plugged in at the time of a scheduled start, will it power on as soon as it is plugged in? Otherwise, distribute the switched output of one of the devices above to the O2 and power supply and a simple circuit with Resistors and Capacitors that momentarily triggers a relay (connected to the O2's power switch) after a short delay.