Thanks, Brooke – I’m glad to hear it should work. 
I’ve used your guide – it is quite similar to others. One thing it lacks is a testing section (e.g. GitHub’s).
In attempting to debug, I have run ssh with the -v option – I do see the connection established, and the proper key sent to your server. However, the key is not accepted, and the connection then asks for the account’s password.
Any ideas?