>>My Canon PS100 Elph uses CF and I've been unable to get the software to let me connect it with the usual USB cable.
Doesn't the software that comes with the camera?
>>Power - Would the webplayer accept Italian power
yep, the powersupply is an international type: 100-240V and 50-60Hz
This is sufficient worldwide.
>>if I found or constructed a replacement cable to run from the tranformer to wall outlet with the appropriate plug on the end?
You can probably find a suitable power cable localy. One end is the same as a pc power supply socket so that wouldn't be so
difficult to find. They have two different plugs in Italy. Look here for more information: Help for World Travelers and take the World Electric Guide section.
>>Telephone - Are the phone jacks different over there?
Yes they are. Be carefull with plugging in modems in an unkown telephone plug.
Different voltage signals can damage your modem. There are adapters available for this.
Look on the same site for more info.
>>An ISP - Can anyone suggest an ISP that I could get for the month and maybe has international/Europe access numbers.
Try this one: GRIC is an international alliance of ISP's serving you
with worldwide access to the internet.