There are now a few different WordPress plug-ins that will generate a temporary URL for file downloads to video streaming, to prevent both bandwidth and content theft. It would be nice to have similar functionality built into XSitePro.
For example, I host a number of large video files for a membership site. I am constantly encountering space limitations on my server and would like to move all or most of the files over to my S3 account. The only thing preventing me from doing so is a security concern, which is two-fold. I don't want people stealing content they have not paid for and I don't want other website owners poaching off of my S3 bandwidth.
Amazon provides the API for generating temporary URL's and several programmers have capitalized upon the need to develop scripts for WordPress, Joomla, etc. Probably one of the more popular ones is S3 Flow Shield (http://www.s3flowshield.com/
This would be a great addition to XSitePro's feature set and one that I would very much appreciate seeing.