So who's going to try this and report back?
xcomglobal.com.
It's a Mifi and USB modem rental service, which includes a prepaid SIM for about $10-20 a day.
Wouldn't make sense for many countries like Italy, where you can get a cheaper prepaid SIM for data, along with buying an unlocked Mifi on eBay.
But it might not be too bad for somewhere like France, where the prepaid data options aren't too competitive.
SOme hotels charge about this much for Wifi per day, while others have free Wifi.
Main advantage of this would be for people with smart phones who wanted to use them out in the field as well as data for their laptop/iPad/smart phone back at the hotel.