I have decided to buy the private repository on github.com. It costs 7$ per month / one person and that is not that much. But the conditions have changed because Bitbucket started providing Git too!
Bitbucket has release unlimited private and public repositories - and I am going to use it for all my private/not public projects immediately! So, I would like to officially say "Farewell SVN!". You might find more info about that on their blog http://blog.bitbucket.org/2011/10/03/bitbucket-now-rocks-git/