At the beginning of this month, Adobe launched SHARE. The service looks to allow design professionals (us) transfer large files, documents, etc… without using email attachments. All you need is an Adobe ID (free) to try out the beta.
The site can be found here: https://share.adobe.com/adc/login.do
While I haven’t personally uploaded anything, the interface is slick and the possibilities of search a service, which probably will not stay free in the future, are endless.