A new version is out. Check the project’s page for more details and downloads.
This version implements the progress bars on the receiving side and also command line arguments, to quickly start the program. I mainly implemented these command line arguments for myself, so testing would go a little easier. Also, I created a freshmeat project for this thing.
On a discussion side: I think the name ‘MammothCopy’ kind of sucks. It should be marketed as a way of sending files, so MammothSend would already be better. My ‘competition’ also uses the verb ‘to send’ in their marketing and it is supposed to be a alternative to sending big files using e-mail and so on. Just a thought.