This might be the best solution for exchanging large files during Sanctuary post production.
YouSendIt: The Leader in File Delivery.
I've been looking at a range of different options for moving around VFX material. The long and the short of it is that I've been using a minimal storage/unlimited bandwidth account for my sites to-date and the cost of acquiring additional online storage for VFX files comes with the caveat that you invariably get charged for bandwidth as well.
I'm still keen to employ Bit Torrent for distribution but that's only useful if a large number of people are accessing the same files. I'm envisaging small clusters of people trading a limited number of files.
Any other thoughts appreciated.