CloudWok

CloudWok allows anyone to upload straight into your Google Drive, Dropbox, Box.com, Amazon S3 or even Facebook Album. Select the cloud storage that you would like to receive files with, then generate and share a URL to receive uploads from anyone right into your cloud. Besides receiving uploads via your upload URL, you can receive email attachments right into your cloud. CloudWok even can be embedded into your web page or Wordpress blog enabling users to upload into your cloud storage right from within your website or Wordpress blog.

Limitations:

Monthly data limited to 50MB