We will be adding MD5 to the ListFolder call in the Metadata section and in the headers of the download of the file. This is part of a future release that we will announce later.
I'm interested in your idea for a 'blocklist'. Can you elaborate what this would be used for?
Thanks,
Barry R.
IM Support (Feel free to add me)
MSN: barryruffner@msn.com
Gmail: barryruffner@gmail.com