sideCloudload is a new web service that helps users keep download file from website to your Dropbox or Email, that means you don't have to keep it in your computer. It is not required register, just source url and your Dropbox information, or email address, click "Submit", it will send file to your account. It also allows you to upload file from your computer. Another feature is a bookmarklet that allows you quick send file, but you have to edit code, a little bit confusing.
I think this service is good for you want download file to your online clouds account when you use a public computer, or travel outside.