Easy way: You can use xyz1.nfsnssh.com instead of ssh.xyz1.nearlyfreespeech.net if you prefer.
Better way: OpenSSH allows the creation of nicknames. To use this feature, create (or edit) the file ~/.ssh/config (on the client machine you will be connecting from, not ours!) and add content like this:
Host nfsnssh
Hostname ssh.xyz1.nearlyfreespeech.net
Port 22
With this done, you can use "nfsnssh" as if it were a hostname in ssh, scp, and sftp. For example, just use ssh mylogin_mysite@nfsnssh to connect to mysite as mylogin.
You can even use the User option to create per-site nicknames to make commands even shorter:
Host *_nfsn
Hostname ssh.xyz1.nearlyfreespeech.net
Port 22
Host mysite_nfsn
User mylogin_mysite
Host othersite_nfsn
User mylogin_othersite
Then you just ssh mysite_nfsn to connect to mysite and ssh othersite_nfsn to connect to othersite. It doesn't get much shorter than that! See the ssh_config man page for complete details.
If you don't happen to be using OpenSSH, many other ssh tools offer similar options, many with graphical interfaces that make establishing a connection as simple as clicking, regardless of the hostname.