Well its getting close to our Big OE trip May 2014.
2 of us with 2 cell phones and 2 tablets.
What to do which phone and data whilst we are away,.

We are going on 2 Trafalgar tours.
1x 8 days in Uk, IRE, Wales, Scot,
18 Days over main continental Europe- Netherlands, France, Germany, Italy, Lichenstein, ....
Basically 15 countries all up.

Looking at best options for data options.
Im with Telecom and partner with VF.
Smartphones are Note 3 and S3 Mini.
Tablets are Asus TF300 Androidand equiv Win 8.
We will be away for a month.
Have looked at getting a Personal Wifi Hotspit with a Sim card from http://www.trafalgar.ekit.com/ekit/MobileInfo/Data
1Gb or 200mb bundles.
Im sure we can use the same sim card and tether with our current devices rather than buying a separate personal wifi hotspot device.
Im sure we will hardly be making any calls out. 
Another option is one of us has a sim card purely for accepting calls and making emergency calls.
Then the other has the 1 Gb data sim at cost of US$99 and tether with this,
Be interested to know what others have done in this area