It just took three hours for a pre-patched .bin file of Suikoden II to upload to Dropbox.com, and even then, it still wouldn't actually appear there, only in my offline folder. I've just had to send it blindly to someone who applied on PeoplePerHour to hack it, and I'm not sure if he'll even see it.
I had also tried uploading it on Google Drive, zipped in fact, and it still couldn't be previewed or listed with my other stuff there. (Email won't work, because the file is too big to be sent as an attachment.)
Does anyone know of a better place to store .bin files to share with others? This will be especially important once anyone I hire finishes hacking a given game and needs to share it with me.