It's pain to enter password tens of times when doing "svn up", "svn ci" on your own computer everyday. To make everything simpler:

$ ssh-keygen -t dsa 
$ ssh {user}@{server}
server$ mkdir ~/.ssh 
server$ touch ~/.ssh/authorized_keys2     
server$ chmod go-rw -R .ssh
server$ exit
$ ssh {user}@{server} 'cat >> ~/.ssh/authorized_keys2' < ~/.ssh/id_dsa.pub
$ ssh {user}@{server}                      

There you go, if you follow all these steps, you should be able to login with out a password.