$ export CVS_RSH=/usr/bin/ssh $ export CVSROOT='username@cvs.busybox.net:/var/cvs'
To obtain commit access, you will need to demonstrate you are serious by submitting a few good patches first. Then, you will need to select a user-name to use when committing stuff, and finally, you will need to send me the username you have selected, an ssh key, and the email address where you prefer email to be sent (I will forward any email sent to you, but not store it).
Note that if you would prefer to keep your communications with me private, you can encrypt your email using my public key.