Here's a good move by the EU - put in place regulation to prevent roaming users from running up huge bills.
From July 1st, travelers using mobile data in Europe will be cut off from the internet if they hit a €50 (around $60) ceiling. All mobile operators will also be required to give customers a warning when they reach 80% of the charges ceiling.
On top of that, there are roaming data price cuts. The maximum price per MB of roaming data uploaded or downloaded will be cut from €1 to €0.80. This will be cut again nest year to €0.50.
I've heard countless horror stories of people racking up incredible (and close to criminal) roaming charges. This should help make Europeans feel more confident when traveling. US mobile providers should now follow suit.