For photos, I use Flickr. But for other documents...Which web based online application (hosted or to install on your personal web site) do you use for PDF or word files ? If there is a user management it would be also great (for example you decide that some persons, or everyone, can see some of your documents...).
Google Docs?
It is capable of storing PDFs but your word documents will be converted to the the google doc format. (which then can be converted back to Word or RTF or PDF etc'