I've seen a lot of discussion about bringing an unlocked cell phone to Europe and buying a SIM card there, but has anyone ever tried to buy an unlocked wifi hotspot and pop in a European SIM card for data only?
My idea is that I can use Skype and Google Voice from my devices whenever I have WiFi (in hotels, for example), but for times when the WiFi is unreliable or unavailable I might have to resort to cellular data--but I'd still likely want to use my Skype or GV services, hence carrying a small, unlocked WiFi hotspot and buying a local SIM card for data.
E.g. search for "Unlocked Hotspot" on either eBay or Amazon.