Liz,
Before providing specific advice, it would help to know some of the technical details of your "small electronic devices".
You'll need to look on the nameplate of each of the Chargers for the devices you'll be travelling with, specifically for the Input Voltage. If this states "100-240 VAC, 50/60 Hz", then the product is designed for "world operation" and will work fine in Europe with only a Plug Adapter.
The Euro-style Plug Adapter for use in Italy has two round pins. I'd suggest travelling with at least two of these, so that you'll be able to charge more than one item at a time and this also provides a "spare" in case you forget one in the Hotel room.
One other question that needs clarification is which Cellphone network are you with? If you're with AT&T or T-Mobile and have a quad-band GSM phone, you'll be fine in Europe. If you're with Verizon or Sprint, you'll need to contact them regarding roaming in Europe (I believe they can provide a rental phone).
Happy travels!