> Now I update my checkout syntax to make use of my alias rather than specifying the host directly, like this:
>
> svn co svn+ssh://lorna@lornajane/desired/path

A better way is to use svn switch instead of redo the check out of the repository:
svn switch svn+ssh://[email protected]/desired/path svn+ssh://lorna@lornajane/desired/path path