[lobster_johnson]

There are some Terms of Service [1] items that might come and back and bite you (or not — who knows, they're a bit vague):

    The Service is offered in the United States. We may 
    restrict access from other locations. There may be
    limits on the types of content you can store and 
    share using the Service, such as file types we 
    don't support, and on the number or type of devices
    you can use to access the Service.

The fact that they "may restrict access from other locations" could be a problem when you travel.

[1] http://www.zdnet.com/article/is-amazons-online-storage-reall...