We rented mifi units from Xcom global so that our group could still have our data plan hog iPhones and still travel with them.
Xcomglobal offers unlimited data plan units and you can hang 5 devices off of each unit.
Upload speed is what it is, but download speed ain't bad.
They sent a unit per country interestingly enough as each unit needs a cell phone chip and a APN info specifically set for that country. Granted if you knew the settings you could take one base but obviously they are catering to the use it and it works crowd by sending separate units for each country we are in. Today we are hanging off of Vodafone Omnitel N.V.