Traveling through remote places in Asia I never missed a cybercafe where I could connect or burn CDs or DVDs of my photos to erase the camera card again and start over. In almost every moderately tourist town in this world you will find a place where the connection speed will leave a lot to be desired but after all you can catch up with your mail.
Cybercafes.com is a good utility for your trips. It is a database with more than 4,000 internet connection points among 141 countries in the world.
It is not yet time to forget the directory section of Lonely Planet or other guides. Taking a look I see, for example, that only 7 Internet cafes appear in China. They still have a long way to go to have a fully functioning database but, without a doubt, it is a very useful tool before preparing your trips or even for nearby trips.