Hello there! I have something really nice to show: I have found some servers that give you user rights via ssh or telnet + a list of standard *NIX tools you may use + some space to save your files, FREE. It is really interesting so why not give it a try? You can backup your source there, have access to it from every computer with an ssh client like (Putty for windows) or standard openssh for linux.
I have tested: http://www.rootshell.be
(create an account in the site first) http://www.grex.org
(same thing, you will find instruction on the website)
A full list of ssh and telnet servers can be found here: http://www.red-pill.eu/freeunix.shtml
If you find some good and free servers there, why not post a review?