Well, I pulled yet another dumb newb trick - failed to write down my password. One of my browsers knows the correct password. It logs me in just fine - and doesn't tell me the password value. If there's a way to get a password emailed to your registered address, I didn't see it.
I can still get onto Haven and Hearth - but only from one system. Hopefully I'll be able to get my browser on that system to reveal the password - once I'm back at that desk. Meanwhile I created a second account just to be able to post to the forums.