I traveled in Europe without a laptop and brought extra USB flash drives to back up my cards. I also tried to use online backup (flickr, dropbox, etc.) but hotel wifi (and even a couple of places that provided desktops with wired connections) was way too slow for GBs of data. The connection would break every time before 100 photos (jpeg only). I expect they were smart enough to control the bandwidth so people aren't hogging it all for streaming media and the like, just enough for email and web browsing. Since I knew which places on my trip provided desktops, I used them to back up the cards to the USB flash drives.